This article introduces at the 3 main verb forms a verb can take: the infinitive, the present participle and the past form.
The Infinitive
The Infinitive is the base form of a verb. These are infinitives:
love, eat, walk, be
In English, the infinitive is nearly always the same as the present tense. The only exception is the verb be:
I love, I eat, I walk, I am…