English verb conjugation
CAN CROUCH

Regular verb: crouch - crouched - crouched

Affirmation

Simple form	V-ing form
I can crouch you can crouch she can crouch we can crouch you can crouch they can crouch	I can be crouching you can be crouching she can be crouching we can be crouching you can be crouching they can be crouching
Perfect	V-ing perfect
I can have crouched you can have crouched she can have crouched we can have crouched you can have crouched they can have crouched	I can have been crouching you can have been crouching she can have been crouching we can have been crouching you can have been crouching they can have been crouching

Negation

Simple form	V-ing form
I can't crouch you can't crouch she can't crouch we can't crouch you can't crouch they can't crouch	I can't be crouching you can't be crouching she can't be crouching we can't be crouching you can't be crouching they can't be crouching
Perfect	V-ing perfect
I can't have crouched you can't have crouched she can't have crouched we can't have crouched you can't have crouched they can't have crouched	I can't have been crouching you can't have been crouching she can't have been crouching we can't have been crouching you can't have been crouching they can't have been crouching

Interrogative form

Simple form	V-ing form
can I crouch? can you crouch? can she crouch? can we crouch? can you crouch? can they crouch?	can I be crouching? can you be crouching? can she be crouching? can we be crouching? can you be crouching? can they be crouching?
Perfect	V-ing perfect
can I have crouched? can you have crouched? can she have crouched? can we have crouched? can you have crouched? can they have crouched?	can I have been crouching? can you have been crouching? can she have been crouching? can we have been crouching? can you have been crouching? can they have been crouching?

Interro-negative form

Simple form	V-ing form
can't I crouch? can't you crouch? can't she crouch? can't we crouch? can't you crouch? can't they crouch?	can't I be crouching? can't you be crouching? can't she be crouching? can't we be crouching? can't you be crouching? can't they be crouching?
Perfect	V-ing perfect
can't I have crouched? can't you have crouched? can't she have crouched? can't we have crouched? can't you have crouched? can't they have crouched?	can't I have been crouching? can't you have been crouching? can't she have been crouching? can't we have been crouching? can't you have been crouching? can't they have been crouching?