I can mate you can mate she can mate we can mate you can mate they can mate
V-ing form
I can be mating you can be mating she can be mating we can be mating you can be mating they can be mating
Perfect
I can have mated you can have mated she 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 she can have been mating we can have been mating you can have been mating they can have been mating
Negation
Simple form
I can't mate you can't mate she can't mate we can't mate you can't mate they can't mate
V-ing form
I can't be mating you can't be mating she can't be mating we can't be mating you can't be mating they can't be mating
Perfect
I can't have mated you can't have mated she can't have mated we can't have mated you can't have mated they can't have mated
V-ing perfect
I can't have been mating you can't have been mating she can't have been mating we can't have been mating you can't have been mating they can't have been mating
Interrogative form
Simple form
can I mate? can you mate? can she mate? can we mate? can you mate? can they mate?
V-ing form
can I be mating? can you be mating? can she be mating? can we be mating? can you be mating? can they be mating?
Perfect
can I have mated? can you have mated? can she 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 she have been mating? can we have been mating? can you have been mating? can they have been mating?
Interro-negative form
Simple form
can't I mate? can't you mate? can't she mate? can't we mate? can't you mate? can't they mate?
V-ing form
can't I be mating? can't you be mating? can't she be mating? can't we be mating? can't you be mating? can't they be mating?
Perfect
can't I have mated? can't you have mated? can't she have mated? can't we have mated? can't you have mated? can't they have mated?
V-ing perfect
can't I have been mating? can't you have been mating? can't she have been mating? can't we have been mating? can't you have been mating? can't they have been mating?