Conjugation of verb "To sit"
Present Simple Continuous
Negative
He/She/It is not sitting.
Negative
He/She/It was not sitting.
Present Perfect Continuous
Affirmative
He/She/It has been sitting.
Negative
You have not been sitting.
We have not been sitting.
He/She/It has not been sitting.
You have not been sitting.
They have not been sitting.
Interrogative
Has he/she/it been sitting?
Affirmative
He/She/It had been sitting.
Negative
You had not been sitting.
He/She/It had not been sitting.
You had not been sitting.
They had not been sitting.
Interrogative
Had he/she/it been sitting?
Negative
He/She/It will not have sat.
Affirmative
He/She/It would have sat.
Negative
He/She/It would not have sat.
Interrogative
Would he/she/it have sat?