Finite and Nonfinite Verbs

Finite verb :

The finite forms of a verb are the forms where the verb shows tense, person or number. Non-finite verb forms have no person or number, but some types can show tense.

• Finite verb forms include: I go, she goes, he went
• Non-finite verb forms include :  to go, going, gone 

A finite verb is a verb that is inflected for person and for tense according to the rules and categories of the languages in which it occurs. Finite verbs can form independent clauses, which can stand on their own as complete sentences.

Example of finite verb :

• I walked, they walk, and she walk

Non-finite verb :

A verb has no subject, tense, or number. The only finite verb forms are the infinitive (indicated by to), the gerund or the participle (present/past), nonfinite verbs must ordinarily combine with a modal , an auxiliary verb, or the infinitival particle to. 

Example of nonfinite verb :

• I travelled to Germany to improve to German.