Question

use the word ' smile ' as a infinitive , gerund,participle​

Answer 1

Explanation:

Infinitive-to smile.

e.g. It was really hard for Raj to smile on that situation.

Gerund-smiling.

e.g.Smiling helps to be happy.

Participle-smiling.

e.g.Looking at her smiling face I too smiled.

Answer 2

To smile is an infinitive