I could abound you could abound he could abound we could abound you could abound they could abound
V-ing form
I could be abounding you could be abounding he could be abounding we could be abounding you could be abounding they could be abounding
Perfect
I could have abounded you could have abounded he could have abounded we could have abounded you could have abounded they could have abounded
V-ing perfect
I could have been abounding you could have been abounding he could have been abounding we could have been abounding you could have been abounding they could have been abounding
Negation
Simple form
I couldn't abound you couldn't abound he couldn't abound we couldn't abound you couldn't abound they couldn't abound
V-ing form
I couldn't be abounding you couldn't be abounding he couldn't be abounding we couldn't be abounding you couldn't be abounding they couldn't be abounding
Perfect
I couldn't have abounded you couldn't have abounded he couldn't have abounded we couldn't have abounded you couldn't have abounded they couldn't have abounded
V-ing perfect
I couldn't have been abounding you couldn't have been abounding he couldn't have been abounding we couldn't have been abounding you couldn't have been abounding they couldn't have been abounding
Interrogative form
Simple form
could I abound? could you abound? could he abound? could we abound? could you abound? could they abound?
V-ing form
could I be abounding? could you be abounding? could he be abounding? could we be abounding? could you be abounding? could they be abounding?
Perfect
could I have abounded? could you have abounded? could he have abounded? could we have abounded? could you have abounded? could they have abounded?
V-ing perfect
could I have been abounding? could you have been abounding? could he have been abounding? could we have been abounding? could you have been abounding? could they have been abounding?
Interro-negative form
Simple form
couldn't I abound? couldn't you abound? couldn't he abound? couldn't we abound? couldn't you abound? couldn't they abound?
V-ing form
couldn't I be abounding? couldn't you be abounding? couldn't he be abounding? couldn't we be abounding? couldn't you be abounding? couldn't they be abounding?
Perfect
couldn't I have abounded? couldn't you have abounded? couldn't he have abounded? couldn't we have abounded? couldn't you have abounded? couldn't they have abounded?
V-ing perfect
couldn't I have been abounding? couldn't you have been abounding? couldn't he have been abounding? couldn't we have been abounding? couldn't you have been abounding? couldn't they have been abounding?