English verb conjugation
COULD FLINCH

Regular verb: flinch - flinched - flinched

Affirmation

Simple form	V-ing form
I could flinch you could flinch he could flinch we could flinch you could flinch they could flinch	I could be flinching you could be flinching he could be flinching we could be flinching you could be flinching they could be flinching
Perfect	V-ing perfect
I could have flinched you could have flinched he could have flinched we could have flinched you could have flinched they could have flinched	I could have been flinching you could have been flinching he could have been flinching we could have been flinching you could have been flinching they could have been flinching

Negation

Simple form	V-ing form
I could not flinch you could not flinch he could not flinch we could not flinch you could not flinch they could not flinch	I could not be flinching you could not be flinching he could not be flinching we could not be flinching you could not be flinching they could not be flinching
Perfect	V-ing perfect
I could not have flinched you could not have flinched he could not have flinched we could not have flinched you could not have flinched they could not have flinched	I could not have been flinching you could not have been flinching he could not have been flinching we could not have been flinching you could not have been flinching they could not have been flinching

Interrogative form

Simple form	V-ing form
could I flinch? could you flinch? could he flinch? could we flinch? could you flinch? could they flinch?	could I be flinching? could you be flinching? could he be flinching? could we be flinching? could you be flinching? could they be flinching?
Perfect	V-ing perfect
could I have flinched? could you have flinched? could he have flinched? could we have flinched? could you have flinched? could they have flinched?	could I have been flinching? could you have been flinching? could he have been flinching? could we have been flinching? could you have been flinching? could they have been flinching?

Interro-negative form

Simple form	V-ing form
could I not flinch? could you not flinch? could he not flinch? could we not flinch? could you not flinch? could they not flinch?	could I not be flinching? could you not be flinching? could he not be flinching? could we not be flinching? could you not be flinching? could they not be flinching?
Perfect	V-ing perfect
could I not have flinched? could you not have flinched? could he not have flinched? could we not have flinched? could you not have flinched? could they not have flinched?	could I not have been flinching? could you not have been flinching? could he not have been flinching? could we not have been flinching? could you not have been flinching? could they not have been flinching?