could crouch
Regular verb: crouch - crouched- crouched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could crouch
you could crouch
he could crouch
we could crouch
you could crouch
they could crouch 	I could be crouching
you could be crouching
he could be crouching
we could be crouching
you could be crouching
they could be crouching	I could have crouched
you could have crouched
he could have crouched
we could have crouched
you could have crouched
they could have crouched	I could have been crouching
you could have been crouching
he could have been crouching
we could have been crouching
you could have been crouching
they could have been crouching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not crouch
you could not crouch
he could not crouch
we could not crouch
you could not crouch
they could not crouch 	I could not be crouching
you could not be crouching
he could not be crouching
we could not be crouching
you could not be crouching
they could not be crouching	I could not have crouched
you could not have crouched
he could not have crouched
we could not have crouched
you could not have crouched
they could not have crouched	I could not have been crouching
you could not have been crouching
he could not have been crouching
we could not have been crouching
you could not have been crouching
they could not have been crouching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I crouch?
could you crouch?
could he crouch?
could we crouch?
could you crouch?
could they crouch? 	could I be crouching?
could you be crouching?
could he be crouching?
could we be crouching?
could you be crouching?
could they be crouching? 	could I have crouched?
could you have crouched?
could he have crouched?
could we have crouched?
could you have crouched?
could they have crouched? 	could I have been crouching?
could you have been crouching?
could he have been crouching?
could we have been crouching?
could you have been crouching?
could they have been crouching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not crouch?
could you not crouch?
could he not crouch?
could we not crouch?
could you not crouch?
could they not crouch? 	could I not be crouching?
could you not be crouching?
could he not be crouching?
could we not be crouching?
could you not be crouching?
could they not be crouching? 	could I not have crouched?
could you not have crouched?
could he not have crouched?
could we not have crouched?
could you not have crouched?
could they not have crouched? 	could I not have been crouching?
could you not have been crouching?
could he not have been crouching?
could we not have been crouching?
could you not have been crouching?
could they not have been crouching?