could kowtow
Regular verb: kowtow - kowtowed- kowtowed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could kowtow
you could kowtow
he could kowtow
we could kowtow
you could kowtow
they could kowtow 	I could be kowtowing
you could be kowtowing
he could be kowtowing
we could be kowtowing
you could be kowtowing
they could be kowtowing	I could have kowtowed
you could have kowtowed
he 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
he 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
he 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
he 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
he 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
he 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 he kowtow?
could we kowtow?
could you kowtow?
could they kowtow? 	could I be kowtowing?
could you be kowtowing?
could he be kowtowing?
could we be kowtowing?
could you be kowtowing?
could they be kowtowing? 	could I have kowtowed?
could you have kowtowed?
could he 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 he 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 he 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 he 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 he 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 he have been kowtowing?
couldn't we have been kowtowing?
couldn't you have been kowtowing?
couldn't they have been kowtowing?