could embank
Regular verb: embank - embanked- embanked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could embank
you could embank
he could embank
we could embank
you could embank
they could embank 	I could be embanking
you could be embanking
he could be embanking
we could be embanking
you could be embanking
they could be embanking	I could have embanked
you could have embanked
he could have embanked
we could have embanked
you could have embanked
they could have embanked	I could have been embanking
you could have been embanking
he could have been embanking
we could have been embanking
you could have been embanking
they could have been embanking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't embank
you couldn't embank
he couldn't embank
we couldn't embank
you couldn't embank
they couldn't embank 	I couldn't be embanking
you couldn't be embanking
he couldn't be embanking
we couldn't be embanking
you couldn't be embanking
they couldn't be embanking	I couldn't have embanked
you couldn't have embanked
he couldn't have embanked
we couldn't have embanked
you couldn't have embanked
they couldn't have embanked	I couldn't have been embanking
you couldn't have been embanking
he couldn't have been embanking
we couldn't have been embanking
you couldn't have been embanking
they couldn't have been embanking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I embank?
could you embank?
could he embank?
could we embank?
could you embank?
could they embank? 	could I be embanking?
could you be embanking?
could he be embanking?
could we be embanking?
could you be embanking?
could they be embanking? 	could I have embanked?
could you have embanked?
could he have embanked?
could we have embanked?
could you have embanked?
could they have embanked? 	could I have been embanking?
could you have been embanking?
could he have been embanking?
could we have been embanking?
could you have been embanking?
could they have been embanking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I embank?
couldn't you embank?
couldn't he embank?
couldn't we embank?
couldn't you embank?
couldn't they embank? 	couldn't I be embanking?
couldn't you be embanking?
couldn't he be embanking?
couldn't we be embanking?
couldn't you be embanking?
couldn't they be embanking? 	couldn't I have embanked?
couldn't you have embanked?
couldn't he have embanked?
couldn't we have embanked?
couldn't you have embanked?
couldn't they have embanked? 	couldn't I have been embanking?
couldn't you have been embanking?
couldn't he have been embanking?
couldn't we have been embanking?
couldn't you have been embanking?
couldn't they have been embanking?