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