English verb conjugation
CAN CLENCH

Regular verb: clench - clenched - clenched

Affirmation

Simple form	V-ing form
I can clench you can clench he can clench we can clench you can clench they can clench	I can be clenching you can be clenching he can be clenching we can be clenching you can be clenching they can be clenching
Perfect	V-ing perfect
I can have clenched you can have clenched he can have clenched we can have clenched you can have clenched they can have clenched	I can have been clenching you can have been clenching he can have been clenching we can have been clenching you can have been clenching they can have been clenching

Negation

Simple form	V-ing form
I can't clench you can't clench he can't clench we can't clench you can't clench they can't clench	I can't be clenching you can't be clenching he can't be clenching we can't be clenching you can't be clenching they can't be clenching
Perfect	V-ing perfect
I can't have clenched you can't have clenched he can't have clenched we can't have clenched you can't have clenched they can't have clenched	I can't have been clenching you can't have been clenching he can't have been clenching we can't have been clenching you can't have been clenching they can't have been clenching

Interrogative form

Simple form	V-ing form
can I clench? can you clench? can he clench? can we clench? can you clench? can they clench?	can I be clenching? can you be clenching? can he be clenching? can we be clenching? can you be clenching? can they be clenching?
Perfect	V-ing perfect
can I have clenched? can you have clenched? can he have clenched? can we have clenched? can you have clenched? can they have clenched?	can I have been clenching? can you have been clenching? can he have been clenching? can we have been clenching? can you have been clenching? can they have been clenching?

Interro-negative form

Simple form	V-ing form
can't I clench? can't you clench? can't he clench? can't we clench? can't you clench? can't they clench?	can't I be clenching? can't you be clenching? can't he be clenching? can't we be clenching? can't you be clenching? can't they be clenching?
Perfect	V-ing perfect
can't I have clenched? can't you have clenched? can't he have clenched? can't we have clenched? can't you have clenched? can't they have clenched?	can't I have been clenching? can't you have been clenching? can't he have been clenching? can't we have been clenching? can't you have been clenching? can't they have been clenching?