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 couldn't crouch
you couldn't crouch
he couldn't crouch
we couldn't crouch
you couldn't crouch
they couldn't crouch 	I couldn't be crouching
you couldn't be crouching
he couldn't be crouching
we couldn't be crouching
you couldn't be crouching
they couldn't be crouching	I couldn't have crouched
you couldn't have crouched
he couldn't have crouched
we couldn't have crouched
you couldn't have crouched
they couldn't have crouched	I couldn't have been crouching
you couldn't have been crouching
he couldn't have been crouching
we couldn't have been crouching
you couldn't have been crouching
they couldn't 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 	
couldn't I crouch?
couldn't you crouch?
couldn't he crouch?
couldn't we crouch?
couldn't you crouch?
couldn't they crouch? 	couldn't I be crouching?
couldn't you be crouching?
couldn't he be crouching?
couldn't we be crouching?
couldn't you be crouching?
couldn't they be crouching? 	couldn't I have crouched?
couldn't you have crouched?
couldn't he have crouched?
couldn't we have crouched?
couldn't you have crouched?
couldn't they have crouched? 	couldn't I have been crouching?
couldn't you have been crouching?
couldn't he have been crouching?
couldn't we have been crouching?
couldn't you have been crouching?
couldn't they have been crouching?