could cross
Regular verb: cross - crossed- crossed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could cross
you could cross
she could cross
we could cross
you could cross
they could cross 	I could be crossing
you could be crossing
she could be crossing
we could be crossing
you could be crossing
they could be crossing	I could have crossed
you could have crossed
she could have crossed
we could have crossed
you could have crossed
they could have crossed	I could have been crossing
you could have been crossing
she could have been crossing
we could have been crossing
you could have been crossing
they could have been crossing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't cross
you couldn't cross
she couldn't cross
we couldn't cross
you couldn't cross
they couldn't cross 	I couldn't be crossing
you couldn't be crossing
she couldn't be crossing
we couldn't be crossing
you couldn't be crossing
they couldn't be crossing	I couldn't have crossed
you couldn't have crossed
she couldn't have crossed
we couldn't have crossed
you couldn't have crossed
they couldn't have crossed	I couldn't have been crossing
you couldn't have been crossing
she couldn't have been crossing
we couldn't have been crossing
you couldn't have been crossing
they couldn't have been crossing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I cross?
could you cross?
could she cross?
could we cross?
could you cross?
could they cross? 	could I be crossing?
could you be crossing?
could she be crossing?
could we be crossing?
could you be crossing?
could they be crossing? 	could I have crossed?
could you have crossed?
could she have crossed?
could we have crossed?
could you have crossed?
could they have crossed? 	could I have been crossing?
could you have been crossing?
could she have been crossing?
could we have been crossing?
could you have been crossing?
could they have been crossing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I cross?
couldn't you cross?
couldn't she cross?
couldn't we cross?
couldn't you cross?
couldn't they cross? 	couldn't I be crossing?
couldn't you be crossing?
couldn't she be crossing?
couldn't we be crossing?
couldn't you be crossing?
couldn't they be crossing? 	couldn't I have crossed?
couldn't you have crossed?
couldn't she have crossed?
couldn't we have crossed?
couldn't you have crossed?
couldn't they have crossed? 	couldn't I have been crossing?
couldn't you have been crossing?
couldn't she have been crossing?
couldn't we have been crossing?
couldn't you have been crossing?
couldn't they have been crossing?