English verb conjugation
CAN ARCH

Regular verb: arch - arched - arched

Affirmation

Simple form	V-ing form
I can arch you can arch he can arch we can arch you can arch they can arch	I can be arching you can be arching he can be arching we can be arching you can be arching they can be arching
Perfect	V-ing perfect
I can have arched you can have arched he can have arched we can have arched you can have arched they can have arched	I can have been arching you can have been arching he can have been arching we can have been arching you can have been arching they can have been arching

Negation

Simple form	V-ing form
I can't arch you can't arch he can't arch we can't arch you can't arch they can't arch	I can't be arching you can't be arching he can't be arching we can't be arching you can't be arching they can't be arching
Perfect	V-ing perfect
I can't have arched you can't have arched he can't have arched we can't have arched you can't have arched they can't have arched	I can't have been arching you can't have been arching he can't have been arching we can't have been arching you can't have been arching they can't have been arching

Interrogative form

Simple form	V-ing form
can I arch? can you arch? can he arch? can we arch? can you arch? can they arch?	can I be arching? can you be arching? can he be arching? can we be arching? can you be arching? can they be arching?
Perfect	V-ing perfect
can I have arched? can you have arched? can he have arched? can we have arched? can you have arched? can they have arched?	can I have been arching? can you have been arching? can he have been arching? can we have been arching? can you have been arching? can they have been arching?

Interro-negative form

Simple form	V-ing form
can't I arch? can't you arch? can't he arch? can't we arch? can't you arch? can't they arch?	can't I be arching? can't you be arching? can't he be arching? can't we be arching? can't you be arching? can't they be arching?
Perfect	V-ing perfect
can't I have arched? can't you have arched? can't he have arched? can't we have arched? can't you have arched? can't they have arched?	can't I have been arching? can't you have been arching? can't he have been arching? can't we have been arching? can't you have been arching? can't they have been arching?