Answer:

A. am, are, is are forms of the verb to be in the simple present. 'm, 're, 's are short (contracted) forms of am, are, is. 'm not, aren't, isn't are short (contracted forms) of am not, are not, is not.

B.

~ Infinitive - be

~ Past tense - was (for I / he / she / it); were (for we / you / they)

~ Past participle - be, been

~ Present participle - being

C. When deciding whether to use is or are, look at whether the noun is plural or singular. If the noun is singular, use is. If it is plural or there is more than one noun, use are.

D. (You should use 'I am' in a normal sentence)

Examples:

~ I am going to school.

~ I am cooking food.

~ I am writing answers.

~ I am a teacher.

~ I am good.

(Use 'Am I' when you want to ask a question)

Examples:

~ Am I good?

~ Am I playing football?

~ Am I a writer?

~ Am I singing?

*Remember: Am is used to show an action that's happening now (present continuous tense) and to state a fact.

~ I am beautiful (fact)

~ I am singing (present continuous tense)

~ Am I naughty? (fact)

~ Am I eating? (present continuous tense)

E. Was is used in the first person singular (I) and the third person singular (he, she, it). Were is used in the second person singular and plural (you, your, yours) and first and third person plural (we, they).