Could, must, need rules examples
Could, must, need
Could
Could is a polite word used to ask for permission or to request something.
Friendliness is a wonderful quality to have.
Polite questions
Open the window! (imperative)
Could you open the window, please? (polite question)
Buy me a cup of coffee! (imperative)
Could you buy me a map, please? (polite question)
Could you pass me the tea?
Could we visit London?
Could you help us, please?
Could - something possible in the future
Could: Something is possible in the future (not certain).
I could invite Jane.
He could stay at school.
We could go to the supermarket.
Must - mustn't
Must + infinitive = it is necessary to do something. For past tenses use had to.
positive - must |
negative - mustn't |
Mustn't + infinitive = it is necessary not to do something.
Need - needn't
Need
Need + infinitive = Require something because it is very important.
Needn't
Needn't + infinitive = Require something because it is not very important.
I needn't stop
the taxi (because it is not very important to do so).
You needn't stop the taxi.
He / She / It needn't stop the taxi.
We needn't stop the taxi.
You needn't stop the taxi.
They needn't stop the taxi.
Could, mustn't, needn't examples
Could, must, need with explanations, examples and exercises. Change the following sentences into Could, must, need and learn with English online exercises.
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