English grammar (See all our English grammar tips)
NeedNeed expresses necessity, or something lacking. It acts both as an ordinary verb and an auxiliary verb:
• As an ordinary verb (to need), it is conjugated with do/does/did and is followed by the infinitive with to:
I need to do my laundry. I have a necessity to do my laundry.
Do you need anything? Do you have a necessity for anything? Are you lacking or missing anything?
He doesn't need a teacher. He doesn't require a teacher.
• As an auxiliary verb, it is mainly found in its negative and interrogative forms, but is rarely used:
You needn't do it if you don't want to. It's not necessary to do it if you don't want to.
Need I come? Is it necessary for me to come? Must I come?
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