could nest
Regular verb: nest - nested- nested

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could nest
you could nest
she could nest
we could nest
you could nest
they could nest 	I could be nesting
you could be nesting
she could be nesting
we could be nesting
you could be nesting
they could be nesting	I could have nested
you could have nested
she could have nested
we could have nested
you could have nested
they could have nested	I could have been nesting
you could have been nesting
she could have been nesting
we could have been nesting
you could have been nesting
they could have been nesting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not nest
you could not nest
she could not nest
we could not nest
you could not nest
they could not nest 	I could not be nesting
you could not be nesting
she could not be nesting
we could not be nesting
you could not be nesting
they could not be nesting	I could not have nested
you could not have nested
she could not have nested
we could not have nested
you could not have nested
they could not have nested	I could not have been nesting
you could not have been nesting
she could not have been nesting
we could not have been nesting
you could not have been nesting
they could not have been nesting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I nest?
could you nest?
could she nest?
could we nest?
could you nest?
could they nest? 	could I be nesting?
could you be nesting?
could she be nesting?
could we be nesting?
could you be nesting?
could they be nesting? 	could I have nested?
could you have nested?
could she have nested?
could we have nested?
could you have nested?
could they have nested? 	could I have been nesting?
could you have been nesting?
could she have been nesting?
could we have been nesting?
could you have been nesting?
could they have been nesting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not nest?
could you not nest?
could she not nest?
could we not nest?
could you not nest?
could they not nest? 	could I not be nesting?
could you not be nesting?
could she not be nesting?
could we not be nesting?
could you not be nesting?
could they not be nesting? 	could I not have nested?
could you not have nested?
could she not have nested?
could we not have nested?
could you not have nested?
could they not have nested? 	could I not have been nesting?
could you not have been nesting?
could she not have been nesting?
could we not have been nesting?
could you not have been nesting?
could they not have been nesting?