I can mend you can mend she can mend we can mend you can mend they can mend
V-ing form
I can be mending you can be mending she can be mending we can be mending you can be mending they can be mending
Perfect
I can have mended you can have mended she can have mended we can have mended you can have mended they can have mended
V-ing perfect
I can have been mending you can have been mending she can have been mending we can have been mending you can have been mending they can have been mending
Negation
Simple form
I cannot mend you cannot mend she cannot mend we cannot mend you cannot mend they cannot mend
V-ing form
I cannot be mending you cannot be mending she cannot be mending we cannot be mending you cannot be mending they cannot be mending
Perfect
I cannot have mended you cannot have mended she cannot have mended we cannot have mended you cannot have mended they cannot have mended
V-ing perfect
I cannot have been mending you cannot have been mending she cannot have been mending we cannot have been mending you cannot have been mending they cannot have been mending
Interrogative form
Simple form
can I mend? can you mend? can she mend? can we mend? can you mend? can they mend?
V-ing form
can I be mending? can you be mending? can she be mending? can we be mending? can you be mending? can they be mending?
Perfect
can I have mended? can you have mended? can she have mended? can we have mended? can you have mended? can they have mended?
V-ing perfect
can I have been mending? can you have been mending? can she have been mending? can we have been mending? can you have been mending? can they have been mending?
Interro-negative form
Simple form
can I not mend? can you not mend? can she not mend? can we not mend? can you not mend? can they not mend?
V-ing form
can I not be mending? can you not be mending? can she not be mending? can we not be mending? can you not be mending? can they not be mending?
Perfect
can I not have mended? can you not have mended? can she not have mended? can we not have mended? can you not have mended? can they not have mended?
V-ing perfect
can I not have been mending? can you not have been mending? can she not have been mending? can we not have been mending? can you not have been mending? can they not have been mending?