need to do something

used when saying that someone should do something or has to do something 有必要做某事

He needs to see a doctor straightaway.

他有必要马上去看医生。

I need to catch up on my office work.

我有必要赶赶我的办公室工作了。

You need to let me know by Monday if you want to take part.

你得在星期一之前告诉我你想不想参加。

Examples from the Corpus

need to do something• But if repeated calls fail to produce an answer the officer may subsequently need to account for himself.• We need to demonstrate how wrong they are.• Dolphins need to eat considerable quantities of food.• Management needs to ensure that the expensive and long-term project has a good strategic pay-off.• He reminded himself that he needed to have a key made for the desk drawer where he kept her letters.• We need to let kids be responsible, make some choices, let them feel powerful.• They may need to pause for a minute after each picture, since after-images tend to persist.

→ need to do something at need1(1)