I could abase you could abase she could abase we could abase you could abase they could abase
V-ing form
I could be abasing you could be abasing she could be abasing we could be abasing you could be abasing they could be abasing
Perfect
I could have abased you could have abased she could have abased we could have abased you could have abased they could have abased
V-ing perfect
I could have been abasing you could have been abasing she could have been abasing we could have been abasing you could have been abasing they could have been abasing
Negation
Simple form
I couldn't abase you couldn't abase she couldn't abase we couldn't abase you couldn't abase they couldn't abase
V-ing form
I couldn't be abasing you couldn't be abasing she couldn't be abasing we couldn't be abasing you couldn't be abasing they couldn't be abasing
Perfect
I couldn't have abased you couldn't have abased she couldn't have abased we couldn't have abased you couldn't have abased they couldn't have abased
V-ing perfect
I couldn't have been abasing you couldn't have been abasing she couldn't have been abasing we couldn't have been abasing you couldn't have been abasing they couldn't have been abasing
Interrogative form
Simple form
could I abase? could you abase? could she abase? could we abase? could you abase? could they abase?
V-ing form
could I be abasing? could you be abasing? could she be abasing? could we be abasing? could you be abasing? could they be abasing?
Perfect
could I have abased? could you have abased? could she have abased? could we have abased? could you have abased? could they have abased?
V-ing perfect
could I have been abasing? could you have been abasing? could she have been abasing? could we have been abasing? could you have been abasing? could they have been abasing?
Interro-negative form
Simple form
couldn't I abase? couldn't you abase? couldn't she abase? couldn't we abase? couldn't you abase? couldn't they abase?
V-ing form
couldn't I be abasing? couldn't you be abasing? couldn't she be abasing? couldn't we be abasing? couldn't you be abasing? couldn't they be abasing?
Perfect
couldn't I have abased? couldn't you have abased? couldn't she have abased? couldn't we have abased? couldn't you have abased? couldn't they have abased?
V-ing perfect
couldn't I have been abasing? couldn't you have been abasing? couldn't she have been abasing? couldn't we have been abasing? couldn't you have been abasing? couldn't they have been abasing?