could culminate
Regular verb: culminate - culminated- culminated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could culminate
you could culminate
she could culminate
we could culminate
you could culminate
they could culminate 	I could be culminating
you could be culminating
she could be culminating
we could be culminating
you could be culminating
they could be culminating	I could have culminated
you could have culminated
she could have culminated
we could have culminated
you could have culminated
they could have culminated	I could have been culminating
you could have been culminating
she could have been culminating
we could have been culminating
you could have been culminating
they could have been culminating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't culminate
you couldn't culminate
she couldn't culminate
we couldn't culminate
you couldn't culminate
they couldn't culminate 	I couldn't be culminating
you couldn't be culminating
she couldn't be culminating
we couldn't be culminating
you couldn't be culminating
they couldn't be culminating	I couldn't have culminated
you couldn't have culminated
she couldn't have culminated
we couldn't have culminated
you couldn't have culminated
they couldn't have culminated	I couldn't have been culminating
you couldn't have been culminating
she couldn't have been culminating
we couldn't have been culminating
you couldn't have been culminating
they couldn't have been culminating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I culminate?
could you culminate?
could she culminate?
could we culminate?
could you culminate?
could they culminate? 	could I be culminating?
could you be culminating?
could she be culminating?
could we be culminating?
could you be culminating?
could they be culminating? 	could I have culminated?
could you have culminated?
could she have culminated?
could we have culminated?
could you have culminated?
could they have culminated? 	could I have been culminating?
could you have been culminating?
could she have been culminating?
could we have been culminating?
could you have been culminating?
could they have been culminating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I culminate?
couldn't you culminate?
couldn't she culminate?
couldn't we culminate?
couldn't you culminate?
couldn't they culminate? 	couldn't I be culminating?
couldn't you be culminating?
couldn't she be culminating?
couldn't we be culminating?
couldn't you be culminating?
couldn't they be culminating? 	couldn't I have culminated?
couldn't you have culminated?
couldn't she have culminated?
couldn't we have culminated?
couldn't you have culminated?
couldn't they have culminated? 	couldn't I have been culminating?
couldn't you have been culminating?
couldn't she have been culminating?
couldn't we have been culminating?
couldn't you have been culminating?
couldn't they have been culminating?