can retreat
Verbo regular: retreat - retreated- retreated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can retreat
you can retreat
he can retreat
we can retreat
you can retreat
they can retreat 	I can be retreating
you can be retreating
he can be retreating
we can be retreating
you can be retreating
they can be retreating	I can have retreated
you can have retreated
he can have retreated
we can have retreated
you can have retreated
they can have retreated	I can have been retreating
you can have been retreating
he can have been retreating
we can have been retreating
you can have been retreating
they can have been retreating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot retreat
you cannot retreat
he cannot retreat
we cannot retreat
you cannot retreat
they cannot retreat 	I cannot be retreating
you cannot be retreating
he cannot be retreating
we cannot be retreating
you cannot be retreating
they cannot be retreating	I cannot have retreated
you cannot have retreated
he cannot have retreated
we cannot have retreated
you cannot have retreated
they cannot have retreated	I cannot have been retreating
you cannot have been retreating
he cannot have been retreating
we cannot have been retreating
you cannot have been retreating
they cannot have been retreating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I retreat?
can you retreat?
can he retreat?
can we retreat?
can you retreat?
can they retreat? 	can I be retreating?
can you be retreating?
can he be retreating?
can we be retreating?
can you be retreating?
can they be retreating? 	can I have retreated?
can you have retreated?
can he have retreated?
can we have retreated?
can you have retreated?
can they have retreated? 	can I have been retreating?
can you have been retreating?
can he have been retreating?
can we have been retreating?
can you have been retreating?
can they have been retreating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not retreat?
can you not retreat?
can he not retreat?
can we not retreat?
can you not retreat?
can they not retreat? 	can I not be retreating?
can you not be retreating?
can he not be retreating?
can we not be retreating?
can you not be retreating?
can they not be retreating? 	can I not have retreated?
can you not have retreated?
can he not have retreated?
can we not have retreated?
can you not have retreated?
can they not have retreated? 	can I not have been retreating?
can you not have been retreating?
can he not have been retreating?
can we not have been retreating?
can you not have been retreating?
can they not have been retreating?