I could bitt you could bitt he could bitt we could bitt you could bitt they could bitt
V-ing form
I could be bitting you could be bitting he could be bitting we could be bitting you could be bitting they could be bitting
Perfect
I could have bitted you could have bitted he could have bitted we could have bitted you could have bitted they could have bitted
V-ing perfect
I could have been bitting you could have been bitting he could have been bitting we could have been bitting you could have been bitting they could have been bitting
Negation
Simple form
I could not bitt you could not bitt he could not bitt we could not bitt you could not bitt they could not bitt
V-ing form
I could not be bitting you could not be bitting he could not be bitting we could not be bitting you could not be bitting they could not be bitting
Perfect
I could not have bitted you could not have bitted he could not have bitted we could not have bitted you could not have bitted they could not have bitted
V-ing perfect
I could not have been bitting you could not have been bitting he could not have been bitting we could not have been bitting you could not have been bitting they could not have been bitting
Interrogative form
Simple form
could I bitt? could you bitt? could he bitt? could we bitt? could you bitt? could they bitt?
V-ing form
could I be bitting? could you be bitting? could he be bitting? could we be bitting? could you be bitting? could they be bitting?
Perfect
could I have bitted? could you have bitted? could he have bitted? could we have bitted? could you have bitted? could they have bitted?
V-ing perfect
could I have been bitting? could you have been bitting? could he have been bitting? could we have been bitting? could you have been bitting? could they have been bitting?
Interro-negative form
Simple form
could I not bitt? could you not bitt? could he not bitt? could we not bitt? could you not bitt? could they not bitt?
V-ing form
could I not be bitting? could you not be bitting? could he not be bitting? could we not be bitting? could you not be bitting? could they not be bitting?
Perfect
could I not have bitted? could you not have bitted? could he not have bitted? could we not have bitted? could you not have bitted? could they not have bitted?
V-ing perfect
could I not have been bitting? could you not have been bitting? could he not have been bitting? could we not have been bitting? could you not have been bitting? could they not have been bitting?