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