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 can't couch you can't couch he can't couch we can't couch you can't couch they can't couch	I can't be couching you can't be couching he can't be couching we can't be couching you can't be couching they can't be couching
Perfect	V-ing perfect
I can't have couched you can't have couched he can't have couched we can't have couched you can't have couched they can't have couched	I can't have been couching you can't have been couching he can't have been couching we can't have been couching you can't have been couching they can't 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't I couch? can't you couch? can't he couch? can't we couch? can't you couch? can't they couch?	can't I be couching? can't you be couching? can't he be couching? can't we be couching? can't you be couching? can't they be couching?
Perfect	V-ing perfect
can't I have couched? can't you have couched? can't he have couched? can't we have couched? can't you have couched? can't they have couched?	can't I have been couching? can't you have been couching? can't he have been couching? can't we have been couching? can't you have been couching? can't they have been couching?