English verb conjugation
COULD COUCH

Regular verb: couch - couched - couched

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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