1. To require sth/sb because they are essential or very important, not just because you would like to have them: [vn] do you need any help? It’s here if you need it. Don’t go—I might need you. They badly needed a change. Food aid is urgently needed. What do you need your own computer for? You can use ours. I don’t need your comments, thank you. [V to INF] I need to get some sleep. He needs to win this game to stay in the match. You don’t need to leave yet, do you? [V –Ing, v to INF] This shirt needs washing. This shirt needs to be washed.
2. [V to Inf] used to show what you should or have to do: All you need to do is complete this form. I didn’t need to go to the bank after all—Mary lent me the money.
Need (to have) your head examined: (Informal) to be crazy
(Negative need not, short form needn’t (BrE) need (not) do sth | need (not) have done sth used to state that sth is/was not necessary or that only very little is/was necessary; used to ask if sth is/was necessary: You needn’t finish that work today. You needn’t have hurried (= it was not necessary for you to hurry, but you did). I need hardly tell you (= you must already know) that the work is dangerous. If she wants anything, she need only ask. All you need bring are sheets. Need you have paid so much?
In BrE there are two separate verbs need: Need as a main verb has the question form do you need? The negative you don’t need and the past forms needed, did you need? And didn’t need. It has two meanings:
1. To require something or to think that something is necessary: Do you need any help? I needed to get some sleep.
2. To have to or to be obliged to do sth: Will we need to show our passports?
Need as a modal verb has: need for all forms of the present tense, need you? As the question form and need not (needn’t) as the negative. The past is need have, needn’t have. It is used to say that something is or is not necessary: Need I pay the whole amount now?
In NAmE only the main verb is used. This leads to some important differences in the use and meaning of need in British and American English.
In NAmE it is more common for need to be used to speak about what is necessary, rather than about what you must do: I don’t need to go home yet — it’s still early. (BrE and NAmE = it isn’t necessary) You don’t need to go home yet — we never go to bed before midnight. (BrE = you don’t have to.)
The difference is even more noticeable in the past tenses: He didn’t need to go to hospital, but he went just to reassure himself. (NAmE) He needn’t have gone to hospital, but he went just to reassure himself. (BrE = he did something that wasn’t necessary.) He didn’t need to go to hospital after all — he only had a few bruises. (BrE= he didn’t go.)
12. OUGHT TO
1. Used to say what is the right thing to do: They ought to apologize. ‘Ought I to write to say thank you?’ ‘Yes, I think you ought (to).’ They ought to have apologized (= but they didn’t). Such things ought not to be allowed. He oughtn’t to have been driving so fast.
2. Used to say what you expect or would like to happen: Children ought to be able to read by the age of 7. Nurses ought to earn more.
3. Used to say what you advise or recommend: We ought to be leaving now. This is delicious. You ought to try some. You ought to have come to the meeting. It was interesting.
4. Used to say what has probably happened or is probably true: If he started out at nine, he ought to be here by now. That ought to be enough food for the four of us. Oughtn’t the water to have boiled by now?
13. USED TO
Used to say that sth happened continuously or frequently during a period in the past: I used to live in London. We used to go sailing on the lake in summer I didn’t use to like him much when we were at school. You used to see a lot of her, didn’t you?
Used to / be used to
Do not confuse used to do sth with be used to sth.
You use used to do sth to talk about something that happened regularly or was the case in the past, but is not now: I used to smoke, but I gave up a couple of years ago.
You use be used to sth / to doing sth to talk about something that you are familiar with so that it no longer seems new or strange to you: We’re used to the noise from the traffic now. I’m used to getting up early. You can also use get used to sth: Don’t worry — you’ll soon get used to his sense of humour. I didn’t think I could ever get used to living in a big city after living in the country.
Except in negatives and questions, the correct form is used to: I used to go there every Saturday. I use to go there every Saturday.
To form questions, use did: Did she use to have long hair? Note that the correct spelling is use to, not ‘used to’.
The negative form is usually didn’t use to, but in BrE this is quite Informal and is not usually used in writing. The negative form used not to (rather formal) and the question form used you to…? (Old-fashioned and very formal) are only used in BrE, usually in writing.
14. HAVE TO
1. (Also have got to) used to show that you must do sth: Sorry, I’ve got to go. Did she have to pay a fine? You don’t have to knock—just walk in. I haven’t got to leave till seven. First, you have to think logically about your fears. I have to admit, the idea of marriage scares me. Do you have to go? (Especially BrE) Have you got to go?
2. (Also “have got to” especially in BrE) used to give advice or recommend sth: You simply have to get a new job. You’ve got to try this recipe—it’s delicious.
3. (Also “have got to” especially in BrE) used to say that sth must be true or must happen: There has to be a reason for his strange behaviour. This war has got to end soon.
4. Used to suggest that an annoying event happens in order to annoy you, or that sb does sth in order to annoy you: Of course, it had to start raining as soon as we got to the beach. Do you have to hum so loudly? (= It is annoying).