Conjugation of verb "To fly"
Present Simple Continuous
Present Perfect Continuous
Negative
He/She/It hasn't been flying.
They haven't been flying.
Interrogative
Has he/she/it been flying?
Negative
He/She/It hadn't been flying.
Interrogative
Had he/she/it been flying?
Negative
He/She/It won't have flown.
Interrogative
Will he/she/it have flown?
Negative
He/She/It wouldn't have flown.
They wouldn't have flown.
Interrogative
Would he/she/it have flown?