could nucleate
Regular verb: nucleate - nucleated- nucleated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could nucleate
you could nucleate
she could nucleate
we could nucleate
you could nucleate
they could nucleate 	I could be nucleating
you could be nucleating
she could be nucleating
we could be nucleating
you could be nucleating
they could be nucleating	I could have nucleated
you could have nucleated
she could have nucleated
we could have nucleated
you could have nucleated
they could have nucleated	I could have been nucleating
you could have been nucleating
she could have been nucleating
we could have been nucleating
you could have been nucleating
they could have been nucleating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't nucleate
you couldn't nucleate
she couldn't nucleate
we couldn't nucleate
you couldn't nucleate
they couldn't nucleate 	I couldn't be nucleating
you couldn't be nucleating
she couldn't be nucleating
we couldn't be nucleating
you couldn't be nucleating
they couldn't be nucleating	I couldn't have nucleated
you couldn't have nucleated
she couldn't have nucleated
we couldn't have nucleated
you couldn't have nucleated
they couldn't have nucleated	I couldn't have been nucleating
you couldn't have been nucleating
she couldn't have been nucleating
we couldn't have been nucleating
you couldn't have been nucleating
they couldn't have been nucleating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I nucleate?
could you nucleate?
could she nucleate?
could we nucleate?
could you nucleate?
could they nucleate? 	could I be nucleating?
could you be nucleating?
could she be nucleating?
could we be nucleating?
could you be nucleating?
could they be nucleating? 	could I have nucleated?
could you have nucleated?
could she have nucleated?
could we have nucleated?
could you have nucleated?
could they have nucleated? 	could I have been nucleating?
could you have been nucleating?
could she have been nucleating?
could we have been nucleating?
could you have been nucleating?
could they have been nucleating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I nucleate?
couldn't you nucleate?
couldn't she nucleate?
couldn't we nucleate?
couldn't you nucleate?
couldn't they nucleate? 	couldn't I be nucleating?
couldn't you be nucleating?
couldn't she be nucleating?
couldn't we be nucleating?
couldn't you be nucleating?
couldn't they be nucleating? 	couldn't I have nucleated?
couldn't you have nucleated?
couldn't she have nucleated?
couldn't we have nucleated?
couldn't you have nucleated?
couldn't they have nucleated? 	couldn't I have been nucleating?
couldn't you have been nucleating?
couldn't she have been nucleating?
couldn't we have been nucleating?
couldn't you have been nucleating?
couldn't they have been nucleating?