could multiply
Regular verb: multiply - multiplied- multiplied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could multiply
you could multiply
she could multiply
we could multiply
you could multiply
they could multiply 	I could be multiplying
you could be multiplying
she could be multiplying
we could be multiplying
you could be multiplying
they could be multiplying	I could have multiplied
you could have multiplied
she could have multiplied
we could have multiplied
you could have multiplied
they could have multiplied	I could have been multiplying
you could have been multiplying
she could have been multiplying
we could have been multiplying
you could have been multiplying
they could have been multiplying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not multiply
you could not multiply
she could not multiply
we could not multiply
you could not multiply
they could not multiply 	I could not be multiplying
you could not be multiplying
she could not be multiplying
we could not be multiplying
you could not be multiplying
they could not be multiplying	I could not have multiplied
you could not have multiplied
she could not have multiplied
we could not have multiplied
you could not have multiplied
they could not have multiplied	I could not have been multiplying
you could not have been multiplying
she could not have been multiplying
we could not have been multiplying
you could not have been multiplying
they could not have been multiplying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I multiply?
could you multiply?
could she multiply?
could we multiply?
could you multiply?
could they multiply? 	could I be multiplying?
could you be multiplying?
could she be multiplying?
could we be multiplying?
could you be multiplying?
could they be multiplying? 	could I have multiplied?
could you have multiplied?
could she have multiplied?
could we have multiplied?
could you have multiplied?
could they have multiplied? 	could I have been multiplying?
could you have been multiplying?
could she have been multiplying?
could we have been multiplying?
could you have been multiplying?
could they have been multiplying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not multiply?
could you not multiply?
could she not multiply?
could we not multiply?
could you not multiply?
could they not multiply? 	could I not be multiplying?
could you not be multiplying?
could she not be multiplying?
could we not be multiplying?
could you not be multiplying?
could they not be multiplying? 	could I not have multiplied?
could you not have multiplied?
could she not have multiplied?
could we not have multiplied?
could you not have multiplied?
could they not have multiplied? 	could I not have been multiplying?
could you not have been multiplying?
could she not have been multiplying?
could we not have been multiplying?
could you not have been multiplying?
could they not have been multiplying?