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 cannot arch you cannot arch he cannot arch we cannot arch you cannot arch they cannot arch	I cannot be arching you cannot be arching he cannot be arching we cannot be arching you cannot be arching they cannot be arching
Perfect	V-ing perfect
I cannot have arched you cannot have arched he cannot have arched we cannot have arched you cannot have arched they cannot have arched	I cannot have been arching you cannot have been arching he cannot have been arching we cannot have been arching you cannot have been arching they cannot 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 I not arch? can you not arch? can he not arch? can we not arch? can you not arch? can they not arch?	can I not be arching? can you not be arching? can he not be arching? can we not be arching? can you not be arching? can they not be arching?
Perfect	V-ing perfect
can I not have arched? can you not have arched? can he not have arched? can we not have arched? can you not have arched? can they not have arched?	can I not have been arching? can you not have been arching? can he not have been arching? can we not have been arching? can you not have been arching? can they not have been arching?