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 couldn't kowtow
you couldn't kowtow
she couldn't kowtow
we couldn't kowtow
you couldn't kowtow
they couldn't kowtow 	I couldn't be kowtowing
you couldn't be kowtowing
she couldn't be kowtowing
we couldn't be kowtowing
you couldn't be kowtowing
they couldn't be kowtowing	I couldn't have kowtowed
you couldn't have kowtowed
she couldn't have kowtowed
we couldn't have kowtowed
you couldn't have kowtowed
they couldn't have kowtowed	I couldn't have been kowtowing
you couldn't have been kowtowing
she couldn't have been kowtowing
we couldn't have been kowtowing
you couldn't have been kowtowing
they couldn't 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 	
couldn't I kowtow?
couldn't you kowtow?
couldn't she kowtow?
couldn't we kowtow?
couldn't you kowtow?
couldn't they kowtow? 	couldn't I be kowtowing?
couldn't you be kowtowing?
couldn't she be kowtowing?
couldn't we be kowtowing?
couldn't you be kowtowing?
couldn't they be kowtowing? 	couldn't I have kowtowed?
couldn't you have kowtowed?
couldn't she have kowtowed?
couldn't we have kowtowed?
couldn't you have kowtowed?
couldn't they have kowtowed? 	couldn't I have been kowtowing?
couldn't you have been kowtowing?
couldn't she have been kowtowing?
couldn't we have been kowtowing?
couldn't you have been kowtowing?
couldn't they have been kowtowing?