could retreat
Regular verb: retreat - retreated- retreated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could retreat
you could retreat
he could retreat
we could retreat
you could retreat
they could retreat 	I could be retreating
you could be retreating
he could be retreating
we could be retreating
you could be retreating
they could be retreating	I could have retreated
you could have retreated
he could have retreated
we could have retreated
you could have retreated
they could have retreated	I could have been retreating
you could have been retreating
he could have been retreating
we could have been retreating
you could have been retreating
they could have been retreating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not retreat
you could not retreat
he could not retreat
we could not retreat
you could not retreat
they could not retreat 	I could not be retreating
you could not be retreating
he could not be retreating
we could not be retreating
you could not be retreating
they could not be retreating	I could not have retreated
you could not have retreated
he could not have retreated
we could not have retreated
you could not have retreated
they could not have retreated	I could not have been retreating
you could not have been retreating
he could not have been retreating
we could not have been retreating
you could not have been retreating
they could not have been retreating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I retreat?
could you retreat?
could he retreat?
could we retreat?
could you retreat?
could they retreat? 	could I be retreating?
could you be retreating?
could he be retreating?
could we be retreating?
could you be retreating?
could they be retreating? 	could I have retreated?
could you have retreated?
could he have retreated?
could we have retreated?
could you have retreated?
could they have retreated? 	could I have been retreating?
could you have been retreating?
could he have been retreating?
could we have been retreating?
could you have been retreating?
could they have been retreating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not retreat?
could you not retreat?
could he not retreat?
could we not retreat?
could you not retreat?
could they not retreat? 	could I not be retreating?
could you not be retreating?
could he not be retreating?
could we not be retreating?
could you not be retreating?
could they not be retreating? 	could I not have retreated?
could you not have retreated?
could he not have retreated?
could we not have retreated?
could you not have retreated?
could they not have retreated? 	could I not have been retreating?
could you not have been retreating?
could he not have been retreating?
could we not have been retreating?
could you not have been retreating?
could they not have been retreating?