Auxiliaries:
ACTIVE VOICE:
be + -ing (Continuous)
have + V3/-ed (Perfect)
do + V1 (Present and Past Simple, NOT Affirmative)
will + V1 (Future)
would + V1 (Conditional)
PASSIVE VOICE:
be + V3/-ed
Sentence Structures:
Affirmative:
Present S - S + V1 (*S3sg + V-(e)s)
Past S - S + V2/-ed
Others - S + aux + V* (as necessary)
Negative: S + aux + not + V*
Interrog.: Aux + S + V*?
Interrog.-Neg: Aux + S + not + V*?