English verb conjugation
CAN CROUCH

Regular verb: crouch - crouched - crouched

Affirmation

Simple form	V-ing form
I can crouch you can crouch he can crouch we can crouch you can crouch they can crouch	I can be crouching you can be crouching he 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 he 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 he 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 cannot crouch you cannot crouch he cannot crouch we cannot crouch you cannot crouch they cannot crouch	I cannot be crouching you cannot be crouching he cannot be crouching we cannot be crouching you cannot be crouching they cannot be crouching
Perfect	V-ing perfect
I cannot have crouched you cannot have crouched he cannot have crouched we cannot have crouched you cannot have crouched they cannot have crouched	I cannot have been crouching you cannot have been crouching he cannot have been crouching we cannot have been crouching you cannot have been crouching they cannot have been crouching

Interrogative form

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