I can flinch you can flinch he can flinch we can flinch you can flinch they can flinch
V-ing form
I can be flinching you can be flinching he can be flinching we can be flinching you can be flinching they can be flinching
Perfect
I can have flinched you can have flinched he can have flinched we can have flinched you can have flinched they can have flinched
V-ing perfect
I can have been flinching you can have been flinching he can have been flinching we can have been flinching you can have been flinching they can have been flinching
Negation
Simple form
I can't flinch you can't flinch he can't flinch we can't flinch you can't flinch they can't flinch
V-ing form
I can't be flinching you can't be flinching he can't be flinching we can't be flinching you can't be flinching they can't be flinching
Perfect
I can't have flinched you can't have flinched he can't have flinched we can't have flinched you can't have flinched they can't have flinched
V-ing perfect
I can't have been flinching you can't have been flinching he can't have been flinching we can't have been flinching you can't have been flinching they can't have been flinching
Interrogative form
Simple form
can I flinch? can you flinch? can he flinch? can we flinch? can you flinch? can they flinch?
V-ing form
can I be flinching? can you be flinching? can he be flinching? can we be flinching? can you be flinching? can they be flinching?
Perfect
can I have flinched? can you have flinched? can he have flinched? can we have flinched? can you have flinched? can they have flinched?
V-ing perfect
can I have been flinching? can you have been flinching? can he have been flinching? can we have been flinching? can you have been flinching? can they have been flinching?
Interro-negative form
Simple form
can't I flinch? can't you flinch? can't he flinch? can't we flinch? can't you flinch? can't they flinch?
V-ing form
can't I be flinching? can't you be flinching? can't he be flinching? can't we be flinching? can't you be flinching? can't they be flinching?
Perfect
can't I have flinched? can't you have flinched? can't he have flinched? can't we have flinched? can't you have flinched? can't they have flinched?
V-ing perfect
can't I have been flinching? can't you have been flinching? can't he have been flinching? can't we have been flinching? can't you have been flinching? can't they have been flinching?