Need is an English word, a verb, meaning "need, must", and can also be used as a noun, meaning "need, must".

The usage of need as a verb:

1.Need can be followed by a noun or gerund, indicating that something or an action is needed. For example:

I need a cup of coffee. )

You need to study hard to pass the exam. )

Need can also be used in negative sentences and interrogative sentences to mean "unnecessary" or "necessary". For example:

You don't need to worry about it. )

-Do you need help? Do you need any help? )

Need can also be used in the passive voice, meaning "need to do something". For example:

This room needs cleaning. )

The usage of need as a noun:

When 1. Need is used as a noun, which is usually used to indicate a certain need or necessity. For example:

More volunteers are badly needed to help. )

There is an urgent need for a new method to solve this problem. It is urgent to adopt a new method to solve this problem. )

Need can also be used with adjectives to indicate a certain degree of need. For example:

The disaster area is in urgent need of food and water. )

Developing countries need better education more and more. )