English verb conjugation
CAN COUCH

Regular verb: couch - couched - couched

Affirmation

Simple form	V-ing form
I can couch you can couch he can couch we can couch you can couch they can couch	I can be couching you can be couching he can be couching we can be couching you can be couching they can be couching
Perfect	V-ing perfect
I can have couched you can have couched he can have couched we can have couched you can have couched they can have couched	I can have been couching you can have been couching he can have been couching we can have been couching you can have been couching they can have been couching

Negation

Simple form	V-ing form
I cannot couch you cannot couch he cannot couch we cannot couch you cannot couch they cannot couch	I cannot be couching you cannot be couching he cannot be couching we cannot be couching you cannot be couching they cannot be couching
Perfect	V-ing perfect
I cannot have couched you cannot have couched he cannot have couched we cannot have couched you cannot have couched they cannot have couched	I cannot have been couching you cannot have been couching he cannot have been couching we cannot have been couching you cannot have been couching they cannot have been couching

Interrogative form

Simple form	V-ing form
can I couch? can you couch? can he couch? can we couch? can you couch? can they couch?	can I be couching? can you be couching? can he be couching? can we be couching? can you be couching? can they be couching?
Perfect	V-ing perfect
can I have couched? can you have couched? can he have couched? can we have couched? can you have couched? can they have couched?	can I have been couching? can you have been couching? can he have been couching? can we have been couching? can you have been couching? can they have been couching?

Interro-negative form

Simple form	V-ing form
can I not couch? can you not couch? can he not couch? can we not couch? can you not couch? can they not couch?	can I not be couching? can you not be couching? can he not be couching? can we not be couching? can you not be couching? can they not be couching?
Perfect	V-ing perfect
can I not have couched? can you not have couched? can he not have couched? can we not have couched? can you not have couched? can they not have couched?	can I not have been couching? can you not have been couching? can he not have been couching? can we not have been couching? can you not have been couching? can they not have been couching?