Conjugation of verb "To improve"
Negative
He/She/It doesn't improve.
Present Simple Continuous
Negative
He/She/It isn't improving.
Negative
He/She/It didn't improve.
Negative
He/She/It wasn't improving.
Negative
He/She/It hasn't improved.
Present Perfect Continuous
Affirmative
He/She/It's been improving.
Negative
I haven't been improving.
You haven't been improving.
We haven't been improving.
He/She/It hasn't been improving.
You haven't been improving.
They haven't been improving.
Interrogative
Has he/she/it been improving?
Have they been improving?
Negative
He/She/It hadn't improved.
Affirmative
He/She/It'd been improving.
Negative
You hadn't been improving.
We hadn't been improving.
He/She/It hadn't been improving.
You hadn't been improving.
They hadn't been improving.
Interrogative
Had he/she/it been improving?
Affirmative
He/She/It'll have improved.
Negative
He/She/It won't have improved.
They won't have improved.
Interrogative
Will he/she/it have improved?
Negative
He/She/It wouldn't improve.
Affirmative
He/She/It'd have improved.
Negative
I wouldn't have improved.
You wouldn't have improved.
We wouldn't have improved.
He/She/It wouldn't have improved.
You wouldn't have improved.
They wouldn't have improved.
Interrogative
Would he/she/it have improved?
Would they have improved?