This modal verb may be either a defective
or a regular verb. As a defective verb “Need”
has only on form and combines with a bare infinitive. For example:
Need I do it?
You needn’t do it just now.
In the reported speech it remains
As a regular verb it has the Past Simple
form ”Needed” and regular negative and
interrogative forms .The regular form is used mainly when the following
infinitive denotes habitual action. For example:
You don’t need to say it every time
you see him.
It is used to express:
- Necessity/mainly used in questions and
Do you need to work hard?
Need she come tomorrow?
She needn’t go there today He is
- When followed by a perfect infinitive
“need” indicates that the action expressed by the infinitive was
performed but was not necessary.
You needn’t have spent all the
She needn’t have left her child