Bare Infinitive

An infinitive not preceded by to is a bare infinitive.

Examples are: write, say, tell, go, work etc.

A bare infinitive can immediately follow a modal auxiliary verb like must or will.

• I will come.
• He must go now.

They are also used after certain principal verbs like bid, watch, see, let, make, help and hear.

• I bade him come.
• Let me see.