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