I can multiply you can multiply she can multiply we can multiply you can multiply they can multiply
V-ing form
I can be multiplying you can be multiplying she can be multiplying we can be multiplying you can be multiplying they can be multiplying
Perfect
I can have multiplied you can have multiplied she can have multiplied we can have multiplied you can have multiplied they can have multiplied
V-ing perfect
I can have been multiplying you can have been multiplying she can have been multiplying we can have been multiplying you can have been multiplying they can have been multiplying
Negation
Simple form
I can't multiply you can't multiply she can't multiply we can't multiply you can't multiply they can't multiply
V-ing form
I can't be multiplying you can't be multiplying she can't be multiplying we can't be multiplying you can't be multiplying they can't be multiplying
Perfect
I can't have multiplied you can't have multiplied she can't have multiplied we can't have multiplied you can't have multiplied they can't have multiplied
V-ing perfect
I can't have been multiplying you can't have been multiplying she can't have been multiplying we can't have been multiplying you can't have been multiplying they can't have been multiplying
Interrogative form
Simple form
can I multiply? can you multiply? can she multiply? can we multiply? can you multiply? can they multiply?
V-ing form
can I be multiplying? can you be multiplying? can she be multiplying? can we be multiplying? can you be multiplying? can they be multiplying?
Perfect
can I have multiplied? can you have multiplied? can she have multiplied? can we have multiplied? can you have multiplied? can they have multiplied?
V-ing perfect
can I have been multiplying? can you have been multiplying? can she have been multiplying? can we have been multiplying? can you have been multiplying? can they have been multiplying?
Interro-negative form
Simple form
can't I multiply? can't you multiply? can't she multiply? can't we multiply? can't you multiply? can't they multiply?
V-ing form
can't I be multiplying? can't you be multiplying? can't she be multiplying? can't we be multiplying? can't you be multiplying? can't they be multiplying?
Perfect
can't I have multiplied? can't you have multiplied? can't she have multiplied? can't we have multiplied? can't you have multiplied? can't they have multiplied?
V-ing perfect
can't I have been multiplying? can't you have been multiplying? can't she have been multiplying? can't we have been multiplying? can't you have been multiplying? can't they have been multiplying?