Infinitive form is "to + root" or "bare infinitive" without "to". Word "to" has no meaning in infinitive form. Infinitive phrases include infinitive verb plus associated words
Arrive means reaching a place at the end of a journey. The infinitive form is "arrive". The past simple form is "arrived". The past participle form is also "arrived"
Play means engaging in activities for enjoyment rather than serious purpose. The infinitive form is "play". The past simple form is "played". The past participle form is also "played"
Infinitive is base form of verb, with present infinitive being most common. There are four other infinitive forms: perfect, perfect continuous, continuous, passive. Negative infinitive formed by placing "not" before any form
"To be" is the most common and complicated English verb. Forms include am, are, is, was, were, be, being, and been. Means to exist, occur, or have characteristics
'To be' is the most common English verb with 8 different forms. It can function as both main verb and auxiliary verb. Base form is 'be', with present tense forms 'am', 'is', 'are'