could bounce
Regular verb: bounce - bounced- bounced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could bounce
you could bounce
she could bounce
we could bounce
you could bounce
they could bounce 	I could be bouncing
you could be bouncing
she could be bouncing
we could be bouncing
you could be bouncing
they could be bouncing	I could have bounced
you could have bounced
she could have bounced
we could have bounced
you could have bounced
they could have bounced	I could have been bouncing
you could have been bouncing
she could have been bouncing
we could have been bouncing
you could have been bouncing
they could have been bouncing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't bounce
you couldn't bounce
she couldn't bounce
we couldn't bounce
you couldn't bounce
they couldn't bounce 	I couldn't be bouncing
you couldn't be bouncing
she couldn't be bouncing
we couldn't be bouncing
you couldn't be bouncing
they couldn't be bouncing	I couldn't have bounced
you couldn't have bounced
she couldn't have bounced
we couldn't have bounced
you couldn't have bounced
they couldn't have bounced	I couldn't have been bouncing
you couldn't have been bouncing
she couldn't have been bouncing
we couldn't have been bouncing
you couldn't have been bouncing
they couldn't have been bouncing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I bounce?
could you bounce?
could she bounce?
could we bounce?
could you bounce?
could they bounce? 	could I be bouncing?
could you be bouncing?
could she be bouncing?
could we be bouncing?
could you be bouncing?
could they be bouncing? 	could I have bounced?
could you have bounced?
could she have bounced?
could we have bounced?
could you have bounced?
could they have bounced? 	could I have been bouncing?
could you have been bouncing?
could she have been bouncing?
could we have been bouncing?
could you have been bouncing?
could they have been bouncing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I bounce?
couldn't you bounce?
couldn't she bounce?
couldn't we bounce?
couldn't you bounce?
couldn't they bounce? 	couldn't I be bouncing?
couldn't you be bouncing?
couldn't she be bouncing?
couldn't we be bouncing?
couldn't you be bouncing?
couldn't they be bouncing? 	couldn't I have bounced?
couldn't you have bounced?
couldn't she have bounced?
couldn't we have bounced?
couldn't you have bounced?
couldn't they have bounced? 	couldn't I have been bouncing?
couldn't you have been bouncing?
couldn't she have been bouncing?
couldn't we have been bouncing?
couldn't you have been bouncing?
couldn't they have been bouncing?