English verb conjugation
COULD RETCH

Regular verb: retch - retched - retched

Affirmation

Simple form	V-ing form
I could retch you could retch she could retch we could retch you could retch they could retch	I could be retching you could be retching she could be retching we could be retching you could be retching they could be retching
Perfect	V-ing perfect
I could have retched you could have retched she could have retched we could have retched you could have retched they could have retched	I could have been retching you could have been retching she could have been retching we could have been retching you could have been retching they could have been retching

Negation

Simple form	V-ing form
I couldn't retch you couldn't retch she couldn't retch we couldn't retch you couldn't retch they couldn't retch	I couldn't be retching you couldn't be retching she couldn't be retching we couldn't be retching you couldn't be retching they couldn't be retching
Perfect	V-ing perfect
I couldn't have retched you couldn't have retched she couldn't have retched we couldn't have retched you couldn't have retched they couldn't have retched	I couldn't have been retching you couldn't have been retching she couldn't have been retching we couldn't have been retching you couldn't have been retching they couldn't have been retching

Interrogative form

Simple form	V-ing form
could I retch? could you retch? could she retch? could we retch? could you retch? could they retch?	could I be retching? could you be retching? could she be retching? could we be retching? could you be retching? could they be retching?
Perfect	V-ing perfect
could I have retched? could you have retched? could she have retched? could we have retched? could you have retched? could they have retched?	could I have been retching? could you have been retching? could she have been retching? could we have been retching? could you have been retching? could they have been retching?

Interro-negative form

Simple form	V-ing form
couldn't I retch? couldn't you retch? couldn't she retch? couldn't we retch? couldn't you retch? couldn't they retch?	couldn't I be retching? couldn't you be retching? couldn't she be retching? couldn't we be retching? couldn't you be retching? couldn't they be retching?
Perfect	V-ing perfect
couldn't I have retched? couldn't you have retched? couldn't she have retched? couldn't we have retched? couldn't you have retched? couldn't they have retched?	couldn't I have been retching? couldn't you have been retching? couldn't she have been retching? couldn't we have been retching? couldn't you have been retching? couldn't they have been retching?