English verb conjugation
CAN KEYPUNCH

Regular verb: keypunch - keypunched - keypunched

Affirmation

Simple form	V-ing form
I can keypunch you can keypunch she can keypunch we can keypunch you can keypunch they can keypunch	I can be keypunching you can be keypunching she can be keypunching we can be keypunching you can be keypunching they can be keypunching
Perfect	V-ing perfect
I can have keypunched you can have keypunched she can have keypunched we can have keypunched you can have keypunched they can have keypunched	I can have been keypunching you can have been keypunching she can have been keypunching we can have been keypunching you can have been keypunching they can have been keypunching

Negation

Simple form	V-ing form
I can't keypunch you can't keypunch she can't keypunch we can't keypunch you can't keypunch they can't keypunch	I can't be keypunching you can't be keypunching she can't be keypunching we can't be keypunching you can't be keypunching they can't be keypunching
Perfect	V-ing perfect
I can't have keypunched you can't have keypunched she can't have keypunched we can't have keypunched you can't have keypunched they can't have keypunched	I can't have been keypunching you can't have been keypunching she can't have been keypunching we can't have been keypunching you can't have been keypunching they can't have been keypunching

Interrogative form

Simple form	V-ing form
can I keypunch? can you keypunch? can she keypunch? can we keypunch? can you keypunch? can they keypunch?	can I be keypunching? can you be keypunching? can she be keypunching? can we be keypunching? can you be keypunching? can they be keypunching?
Perfect	V-ing perfect
can I have keypunched? can you have keypunched? can she have keypunched? can we have keypunched? can you have keypunched? can they have keypunched?	can I have been keypunching? can you have been keypunching? can she have been keypunching? can we have been keypunching? can you have been keypunching? can they have been keypunching?

Interro-negative form

Simple form	V-ing form
can't I keypunch? can't you keypunch? can't she keypunch? can't we keypunch? can't you keypunch? can't they keypunch?	can't I be keypunching? can't you be keypunching? can't she be keypunching? can't we be keypunching? can't you be keypunching? can't they be keypunching?
Perfect	V-ing perfect
can't I have keypunched? can't you have keypunched? can't she have keypunched? can't we have keypunched? can't you have keypunched? can't they have keypunched?	can't I have been keypunching? can't you have been keypunching? can't she have been keypunching? can't we have been keypunching? can't you have been keypunching? can't they have been keypunching?