When he had a problem to solve, he would work at it until he found an answer.

It's quite warm here; we needn't turn the heating on yet.

If you love fried chicken, you needn't give it up.

Need we leave so soon? I'm having a wonderful time.

Need I answer the question? Yes you must/have to. No. you needn't.

He needs to see a doctor right now.

The house needs painting.

The house needs to be painted.

I daren't go out alone at night.

She dare not say what she thinks.

No one dared speak of it.

How dare you speak to your father like that?

Dare you let out the news to the public?

If you dare speak to me like that again, you will be sorry.

He dares to say whatever he wants to say.

I do not dare (to) complain.

I dare not complain.

Do you dare (to) swim in the river?

Dare you swim in the river?

I dare say you are a little angry.

In 1863 the first underground passenger railway in the world opened in London. It ran for just under seven kilometers and allowed people to avoid terrible crowds on the roads above as they travelled to and from work. It took three years to complete and was built using an interesting method. This included digging up the road, laying the track and then building a strong roof over the top. When all those had been done, the road surface was replaced.

Steam engines were used to pull the carriages and it must have been fairly unpleasant for the passengers, with all the smoke and noise. However, the railway quickly proved to be a great success and within six months, more than 25,000 people were using it every day.

Later, engineers managed to construct railways in a system of deep tunnels, which became known as the Tube. This development was only possible with the introduction of electric-powered engines and lifts. The Central London Railway was one of the most successful of these new lines, and was opened in 1900. It had white-painted tunnels and bright red carriages, and proved extremely popular with the public.

She used to smile all the time but now she looks washed out and unhappy.

There used to be a tall tree in front of the classroom.

The shops usedn't to open on Sundays.

The shops didn't use to open on Sundays.

Used there to be a hotel on that corner?

Did there use to be a hotel on that corner?

You had better watch out.

You had better not go there by plane.

You ought to read more to improve your English.

The patient ought not to drink too much.

The patient oughtn't to drink too much.

I have to be off now. My mum is expecting me.

The little boy has to do lots of housework, for his parents have been suffering from illness.

The last bus left, and he had to walk home.

He must have attended the party last night.

Jack must have read the book before.

You might have read about it in the papers.

They may not have known it beforehand.

It was terrifying. We might have been killed.

He can't have taken it home.

I didn't see her in the meeting room this morning. She couldn't have spoken at the meeting.

Can they have left so soon?

You ought to have studied harder.

You should have studied harder.

He oughtn't to have done that.

He shouldn't have done that.

I needn't have taken the umbrella, for the weather is fine.

You needn't have told them again. I have told them already.

You must keep these points in mind while setting your goals.

You should keep these points in mind while setting your goals.

I can't find my purse. I could have left it in the supermarket yesterday, but I'm not sure.

I can't find my purse. I might have left it in the supermarket yesterday, but I'm not sure.

In today's information age, the loss of data can cause serious problems for a company.

Cooking food can be fun. You might also begin to notice the effects not only on your health but in your pocket.

As I approached mile 23, I could see my wife waving a sign.

How many kinds of wild flowers can be seen from your front door?

My room is a mess, but I needn't clean it before I go out tonight. I can do it in the morning.

Samuel, the tallest boy in our class, can easily reach the books on the top shelf.

George can't have gone too far. His coffee is still warm.

I love the weekend, because I needn't get up early on Saturdays and Sundays.

It was really annoying; I couldn't get access to the data bank you had recommended.

You must be careful with the camera. It costs!

Can't you stay a little longer? It's getting late. I really must go now. My daughter is home alone.

Sory,Mum! I failed the job interview again. Oh. it's too bad. You should have made full preparations.

You must be Carol. You haven't changed a bit after all these years.

You may feel all the training a waste of time, but I'm a hundred percent sure later you'll be grateful you did it.

You might feel all the training a waste of time, but I'm a hundred percent sure later you'll be grateful you did it.

I needn't have worried before I came to the new school, for my classmates here are very friendly to me.

It was so noisy that we couldn't hear ourselves speak.

I've ordered some pizza, so we needn't worry about cooking when we get home tired.

My book, The House of Hades, is missing. Who could have taken it?

I can't thank you too much for all your help to my son while we were away from home.

It's sunny today; we needn't bring the umbrell.

... but no matter how many times I asked to watch them, my parents would not let me.

We must find ways to protect our environment.

What's more, we'd better review what we have learned at school.

I was so nervous that I could not open my mouth.

People neglect the fact that our parents are the dearest persons in the world, so we should be nice to our parents.

In a word, every student should have breakfast regularly.

He must have gone to bed, for the light was out.

However, just several days later, I began to feel tired and couldn't concentrate in class.

The poor little boy was never able to see or hear again.

We can't thank you too much for what you've done for us.

You needn't do the exercise if you don't want to.

He can't have been to Beijing before because he knows nothing about it.

He couldn't have been to Beijing before because he knows nothing about it.

Dare you tell your parents about your school records?

Is Jack on duty today? It can't be him. It's his turn tomorrow.

Visit the old man this afternoon? If you must, make sure you wear sunscreens to protect your skin.

What sort of house do you want to have? Something big? Well, it needn't be big--that's not important.

Why does she look so angry after reading Still Alice? She can't be. She must be missing her grandma who has Alzheimer's.

Lack of sleep will make one unhealthy, so you must pay attention to sleeplessness.

Lack of sleep will make one unhealthy, so you should pay attention to sleeplessness.

It was such a difficult examination that a lot of students were unable to finish it on time. That's the case. It's hard to accept the fact that over 90% of my classmates should have failed.

Anyone who drives through a red light shall be fined according to the newly-made traffic regulations.

Knowing his son's death could have been avoided if he had only called the doctor, he always felt he was guilty.

If teens see that their physical condition is causing them to perform badly, they may be motivated to do other activities to get healthy.

Can I smoke in this hall? No, you can't. If you must, please go to the smoking room.

Since you have such good reparations, there should not be any problem about passing the coming job interview.

I am sure I saw Brian in the park this morning. You must be imagining things. He left for America last night.

You needn't get the machine repaired this week. I won't need it until next month.

Each party shall respect the articles of this contract, or a double-sized financial punishment is a must.

You could have got better grades in the last examination, but you were so careless.

I needn't use a clock to wake me up because at six o'clock each morning the train comes by my house.

I'm going to Europe on vacation together with John if I can find the money.

One of our rules is that every student shall wear school uniform while at school.

It's quite warm here; we needn't turn the heating on yet.

We needn't have bought so much food now that Suzie won't be with us for dinner.

Days later, my brother called to say he was all right, but wouldn't say where he was.

Why didn't you come to Simon's party last night? I wanted to, but my mom simply would not let me out so late at night.

Must you interrupt now? Can't you see I'm on the phone? Sorry Sir, but it's urgent.

If you must smoke, please go outside.

I don't really like James. Why did you invite him? Don't worry. He might not come. He said he wasn't certain what his plans were.

Shall I inform him of the change of the schedule right now? I am afraid you must, in case he comes late for the meeting.

What do you think of store shopping in the future? Personally, I think it will exist along with home shopping but will never be replaced.

How's your new babysitter? We couldn't ask for a better one. All our kids love her so much.

The police still haven't found the lost child, but they're doing all they can.

Will you read me a story, Mummy? OK. You shall have one if you go to bed as soon as possible.

No one can be compared with Yao Ming in playing basketball.

It can't be the postman at the door. It's only six o'clock.

"You must have a wrong number," she said. "There's no one of that name here."

Jack described his father, who must have been a brave boy many years ago, as a strong-willed man.

You don't have to buy a gift, but you can if you want to.

I have told you the truth. Must I keep repeating it?

I shouldn't have watched that movie--it'll give me horrible dreams.

Mark needn't have hurried. After driving at top speed, he arrived half an hour early.

May I take the book out? I'm afraid not.

May I take this book out of the reading room? No, you mustn't. You read it in here.

Just be patient. You can't expect the world to change so soon.

I'm afraid Mr. Harding can't see you now. He's busy.

Doctors say that exercise is important for health, but it must be regular exercise.

If you must go, at least wait until the storm is over.

You mustn't park here! It's an emergency exit.

Cable television is very popular nowadays because it can provide more programmes.

John can't be in New York because I saw him in town only a few minutes ago.

What do you mean, there are only ten tickets? There should be twelve.

That car is my property; you mustn't use it without permission.

He knows everything about the book, so he must have read it.

My wallet isn't in my bag. Where can I have put it?

You shouldn't have told her the bad news, she cried all night long.

A: I missed the train! If only I had set off for the station ten minutes earlier!

B: What a pity! But for the heavy traffic, you could/would have caught the train. By the way, must you leave now?

A: Yes, I may/might as well get home as soon as possible. My wife and son may/might well wait for me with anxiety. How can I get them relieved?

B: Don't worry. Ring them up and tell them what happened. Should they receive the news, they would feel at ease. Are they going to pick you up by car?

A: I'm not sure. They may/might take a bus. The station is not far from my home. Oh. It's high time that I should give/gave them a call. How I wish I could make them relaxed.

B: Do it right away!

A: Thank you for reminding me of that.

B: Don't mention it.

He can't have been to Beijing before because he knows nothing about it.

He couldn't have been to Beijing before because he knows nothing about it.

You needn't return the dictionary now. You can keep it till next week if you like.

The boy can be really annoying at times, but after a while, you'll get used to him.

The traffic is heavy these days. I might be a bit late, so could you save me a seat?

The traffic is heavy these days. I may be a bit late, so could you save me a seat?

You mustn't drive forward when the traffic light is red.

When he was there, he would go to the coffee shop at the corner after work every day.

What have you learned from your experience in Thailand? Well, meeting people from another culture can be very difficult.

John promised his doctor he would not smoke, and he has never smoked ever since.

She looked as if she were made of ice.

If Mr. Dewey had been present, he would have offered any possible assistance to the people there.

We would rather our daughter stayed at home with us, but it is her choice, and she is not a child any longer.

It's high time we had have a rest.

It's high time we should have a rest.

If he had spent more time practising speaking English before, he would be able to speak it much better now.

The weather is looking up.

I don't know anything about the accident.

I hope you don't mind what I said.

Do you have a camera?

How long have you been living here?

You are from Italy, aren't you?

Come in and take a seat.

Be careful!

Don't oversleep Sundays!

If I were you, I would forgive mary.

I wish you had come to the party yesterday.

If only you could understand me!

If I have enough money next year, I'll go to America.

If I am to blame, you are to blame, too.

Unless bad weather stops me, I jog every day.

What would you do if you had a million dollars?

If I were you, I'd take a small present.

If we hadn't made adequate preparations, the meeting wouldn't have been so successful.

If it should snow tomorrow, they couldn't go out.

If you had taken my advice then, you wouldn't be in trouble now.

If I were you, I would have chosen to take the job.

She would have come to see you, but she was so busy that day.

If she had not been so busy that day, she would have come to see you.

Such mistakes could have been avoided.

Helping a person forget something is rarely easy, especially if the "something" is hurtful or negative. Use some simple techniques to distract from the issue and hopefully with time, the person won't be able to remember what he is supposed to forget.

Remove all the items that may bring back the memory. Any small objects can jog his memory, so carefully replace any photos, diaries or any other personal objects or presents with new items.

Change the subject whenever your friend brings it up. Don't do this in an obvious way because this is annoying, but do it without his awareness of your intention. Tell some amusing stories or talk about important and happy events in your friend's life such as a new nephew or a work promotion.

Occupy him with activities and appointments. Keeping him too busy to think about the past helps him see a positive light. Create a full schedule and introduce new things and experiences, such as a cooking class, which require concentration.

Be patient and allow time to get over things. It will be often a long time before your friend fully removes that memory, so don't be disappointed if it doesn't happen immediately.