Having studied several different grammar books, I am still confused as to whether these have the same meaning and can you use them interchangeably?
- Don't need to
- Don't have to
Would you tell me what is the difference between these and when you would rather use them? and what is the past tense of these?
- Tell her she needn't work tonight.
- Tell her she doesn't need to work tonight.
Do you consider this explanation correct?
- If we talk about a matter that is about general necessity, we must use don't need to do something
- If we don't talk about habitual and general society, then we must use needn't do something