I can mate you can mate he can mate we can mate you can mate they can mate
V-ing form
I can be mating you can be mating he can be mating we can be mating you can be mating they can be mating
Perfect
I can have mated you can have mated he can have mated we can have mated you can have mated they can have mated
V-ing perfect
I can have been mating you can have been mating he can have been mating we can have been mating you can have been mating they can have been mating
Negation
Simple form
I cannot mate you cannot mate he cannot mate we cannot mate you cannot mate they cannot mate
V-ing form
I cannot be mating you cannot be mating he cannot be mating we cannot be mating you cannot be mating they cannot be mating
Perfect
I cannot have mated you cannot have mated he cannot have mated we cannot have mated you cannot have mated they cannot have mated
V-ing perfect
I cannot have been mating you cannot have been mating he cannot have been mating we cannot have been mating you cannot have been mating they cannot have been mating
Interrogative form
Simple form
can I mate? can you mate? can he mate? can we mate? can you mate? can they mate?
V-ing form
can I be mating? can you be mating? can he be mating? can we be mating? can you be mating? can they be mating?
Perfect
can I have mated? can you have mated? can he have mated? can we have mated? can you have mated? can they have mated?
V-ing perfect
can I have been mating? can you have been mating? can he have been mating? can we have been mating? can you have been mating? can they have been mating?
Interro-negative form
Simple form
can I not mate? can you not mate? can he not mate? can we not mate? can you not mate? can they not mate?
V-ing form
can I not be mating? can you not be mating? can he not be mating? can we not be mating? can you not be mating? can they not be mating?
Perfect
can I not have mated? can you not have mated? can he not have mated? can we not have mated? can you not have mated? can they not have mated?
V-ing perfect
can I not have been mating? can you not have been mating? can he not have been mating? can we not have been mating? can you not have been mating? can they not have been mating?