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 couldn't retreat
you couldn't retreat
he couldn't retreat
we couldn't retreat
you couldn't retreat
they couldn't retreat 	I couldn't be retreating
you couldn't be retreating
he couldn't be retreating
we couldn't be retreating
you couldn't be retreating
they couldn't be retreating	I couldn't have retreated
you couldn't have retreated
he couldn't have retreated
we couldn't have retreated
you couldn't have retreated
they couldn't have retreated	I couldn't have been retreating
you couldn't have been retreating
he couldn't have been retreating
we couldn't have been retreating
you couldn't have been retreating
they couldn't 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 	
couldn't I retreat?
couldn't you retreat?
couldn't he retreat?
couldn't we retreat?
couldn't you retreat?
couldn't they retreat? 	couldn't I be retreating?
couldn't you be retreating?
couldn't he be retreating?
couldn't we be retreating?
couldn't you be retreating?
couldn't they be retreating? 	couldn't I have retreated?
couldn't you have retreated?
couldn't he have retreated?
couldn't we have retreated?
couldn't you have retreated?
couldn't they have retreated? 	couldn't I have been retreating?
couldn't you have been retreating?
couldn't he have been retreating?
couldn't we have been retreating?
couldn't you have been retreating?
couldn't they have been retreating?