English verb conjugation
COULD UNCLENCH

Regular verb: unclench - unclenched - unclenched

Affirmation

Simple form	V-ing form
I could unclench you could unclench he could unclench we could unclench you could unclench they could unclench	I could be unclenching you could be unclenching he could be unclenching we could be unclenching you could be unclenching they could be unclenching
Perfect	V-ing perfect
I could have unclenched you could have unclenched he could have unclenched we could have unclenched you could have unclenched they could have unclenched	I could have been unclenching you could have been unclenching he could have been unclenching we could have been unclenching you could have been unclenching they could have been unclenching

Negation

Simple form	V-ing form
I couldn't unclench you couldn't unclench he couldn't unclench we couldn't unclench you couldn't unclench they couldn't unclench	I couldn't be unclenching you couldn't be unclenching he couldn't be unclenching we couldn't be unclenching you couldn't be unclenching they couldn't be unclenching
Perfect	V-ing perfect
I couldn't have unclenched you couldn't have unclenched he couldn't have unclenched we couldn't have unclenched you couldn't have unclenched they couldn't have unclenched	I couldn't have been unclenching you couldn't have been unclenching he couldn't have been unclenching we couldn't have been unclenching you couldn't have been unclenching they couldn't have been unclenching

Interrogative form

Simple form	V-ing form
could I unclench? could you unclench? could he unclench? could we unclench? could you unclench? could they unclench?	could I be unclenching? could you be unclenching? could he be unclenching? could we be unclenching? could you be unclenching? could they be unclenching?
Perfect	V-ing perfect
could I have unclenched? could you have unclenched? could he have unclenched? could we have unclenched? could you have unclenched? could they have unclenched?	could I have been unclenching? could you have been unclenching? could he have been unclenching? could we have been unclenching? could you have been unclenching? could they have been unclenching?

Interro-negative form

Simple form	V-ing form
couldn't I unclench? couldn't you unclench? couldn't he unclench? couldn't we unclench? couldn't you unclench? couldn't they unclench?	couldn't I be unclenching? couldn't you be unclenching? couldn't he be unclenching? couldn't we be unclenching? couldn't you be unclenching? couldn't they be unclenching?
Perfect	V-ing perfect
couldn't I have unclenched? couldn't you have unclenched? couldn't he have unclenched? couldn't we have unclenched? couldn't you have unclenched? couldn't they have unclenched?	couldn't I have been unclenching? couldn't you have been unclenching? couldn't he have been unclenching? couldn't we have been unclenching? couldn't you have been unclenching? couldn't they have been unclenching?