could kowtow
Regular verb: kowtow - kowtowed- kowtowed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could kowtow
you could kowtow
she could kowtow
we could kowtow
you could kowtow
they could kowtow 	I could be kowtowing
you could be kowtowing
she could be kowtowing
we could be kowtowing
you could be kowtowing
they could be kowtowing	I could have kowtowed
you could have kowtowed
she could have kowtowed
we could have kowtowed
you could have kowtowed
they could have kowtowed	I could have been kowtowing
you could have been kowtowing
she could have been kowtowing
we could have been kowtowing
you could have been kowtowing
they could have been kowtowing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not kowtow
you could not kowtow
she could not kowtow
we could not kowtow
you could not kowtow
they could not kowtow 	I could not be kowtowing
you could not be kowtowing
she could not be kowtowing
we could not be kowtowing
you could not be kowtowing
they could not be kowtowing	I could not have kowtowed
you could not have kowtowed
she could not have kowtowed
we could not have kowtowed
you could not have kowtowed
they could not have kowtowed	I could not have been kowtowing
you could not have been kowtowing
she could not have been kowtowing
we could not have been kowtowing
you could not have been kowtowing
they could not have been kowtowing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I kowtow?
could you kowtow?
could she kowtow?
could we kowtow?
could you kowtow?
could they kowtow? 	could I be kowtowing?
could you be kowtowing?
could she be kowtowing?
could we be kowtowing?
could you be kowtowing?
could they be kowtowing? 	could I have kowtowed?
could you have kowtowed?
could she have kowtowed?
could we have kowtowed?
could you have kowtowed?
could they have kowtowed? 	could I have been kowtowing?
could you have been kowtowing?
could she have been kowtowing?
could we have been kowtowing?
could you have been kowtowing?
could they have been kowtowing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not kowtow?
could you not kowtow?
could she not kowtow?
could we not kowtow?
could you not kowtow?
could they not kowtow? 	could I not be kowtowing?
could you not be kowtowing?
could she not be kowtowing?
could we not be kowtowing?
could you not be kowtowing?
could they not be kowtowing? 	could I not have kowtowed?
could you not have kowtowed?
could she not have kowtowed?
could we not have kowtowed?
could you not have kowtowed?
could they not have kowtowed? 	could I not have been kowtowing?
could you not have been kowtowing?
could she not have been kowtowing?
could we not have been kowtowing?
could you not have been kowtowing?
could they not have been kowtowing?