Conjugation of verb "To sell"
Present Simple Continuous
Negative
He/She/It wasn't selling.
Present Perfect Continuous
Affirmative
He/She/It's been selling.
Negative
You haven't been selling.
He/She/It hasn't been selling.
You haven't been selling.
They haven't been selling.
Interrogative
Has he/she/it been selling?
Affirmative
He/She/It'd been selling.
Negative
He/She/It hadn't been selling.
They hadn't been selling.
Interrogative
Had he/she/it been selling?
Negative
He/She/It won't have sold.
Interrogative
Will he/she/it have sold?
Negative
He/She/It wouldn't have sold.
Interrogative
Would he/she/it have sold?