could bowl
Regular verb: bowl - bowled- bowled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could bowl
you could bowl
she could bowl
we could bowl
you could bowl
they could bowl 	I could be bowling
you could be bowling
she could be bowling
we could be bowling
you could be bowling
they could be bowling	I could have bowled
you could have bowled
she could have bowled
we could have bowled
you could have bowled
they could have bowled	I could have been bowling
you could have been bowling
she could have been bowling
we could have been bowling
you could have been bowling
they could have been bowling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't bowl
you couldn't bowl
she couldn't bowl
we couldn't bowl
you couldn't bowl
they couldn't bowl 	I couldn't be bowling
you couldn't be bowling
she couldn't be bowling
we couldn't be bowling
you couldn't be bowling
they couldn't be bowling	I couldn't have bowled
you couldn't have bowled
she couldn't have bowled
we couldn't have bowled
you couldn't have bowled
they couldn't have bowled	I couldn't have been bowling
you couldn't have been bowling
she couldn't have been bowling
we couldn't have been bowling
you couldn't have been bowling
they couldn't have been bowling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I bowl?
could you bowl?
could she bowl?
could we bowl?
could you bowl?
could they bowl? 	could I be bowling?
could you be bowling?
could she be bowling?
could we be bowling?
could you be bowling?
could they be bowling? 	could I have bowled?
could you have bowled?
could she have bowled?
could we have bowled?
could you have bowled?
could they have bowled? 	could I have been bowling?
could you have been bowling?
could she have been bowling?
could we have been bowling?
could you have been bowling?
could they have been bowling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I bowl?
couldn't you bowl?
couldn't she bowl?
couldn't we bowl?
couldn't you bowl?
couldn't they bowl? 	couldn't I be bowling?
couldn't you be bowling?
couldn't she be bowling?
couldn't we be bowling?
couldn't you be bowling?
couldn't they be bowling? 	couldn't I have bowled?
couldn't you have bowled?
couldn't she have bowled?
couldn't we have bowled?
couldn't you have bowled?
couldn't they have bowled? 	couldn't I have been bowling?
couldn't you have been bowling?
couldn't she have been bowling?
couldn't we have been bowling?
couldn't you have been bowling?
couldn't they have been bowling?