I could moan you could moan he could moan we could moan you could moan they could moan
V-ing form
I could be moaning you could be moaning he could be moaning we could be moaning you could be moaning they could be moaning
Perfect
I could have moaned you could have moaned he could have moaned we could have moaned you could have moaned they could have moaned
V-ing perfect
I could have been moaning you could have been moaning he could have been moaning we could have been moaning you could have been moaning they could have been moaning
Negation
Simple form
I could not moan you could not moan he could not moan we could not moan you could not moan they could not moan
V-ing form
I could not be moaning you could not be moaning he could not be moaning we could not be moaning you could not be moaning they could not be moaning
Perfect
I could not have moaned you could not have moaned he could not have moaned we could not have moaned you could not have moaned they could not have moaned
V-ing perfect
I could not have been moaning you could not have been moaning he could not have been moaning we could not have been moaning you could not have been moaning they could not have been moaning
Interrogative form
Simple form
could I moan? could you moan? could he moan? could we moan? could you moan? could they moan?
V-ing form
could I be moaning? could you be moaning? could he be moaning? could we be moaning? could you be moaning? could they be moaning?
Perfect
could I have moaned? could you have moaned? could he have moaned? could we have moaned? could you have moaned? could they have moaned?
V-ing perfect
could I have been moaning? could you have been moaning? could he have been moaning? could we have been moaning? could you have been moaning? could they have been moaning?
Interro-negative form
Simple form
could I not moan? could you not moan? could he not moan? could we not moan? could you not moan? could they not moan?
V-ing form
could I not be moaning? could you not be moaning? could he not be moaning? could we not be moaning? could you not be moaning? could they not be moaning?
Perfect
could I not have moaned? could you not have moaned? could he not have moaned? could we not have moaned? could you not have moaned? could they not have moaned?
V-ing perfect
could I not have been moaning? could you not have been moaning? could he not have been moaning? could we not have been moaning? could you not have been moaning? could they not have been moaning?