I may arch you may arch she may arch we may arch you may arch they may arch
V-ing form
I may be arching you may be arching she may be arching we may be arching you may be arching they may be arching
Perfect
I may have arched you may have arched she may have arched we may have arched you may have arched they may have arched
V-ing perfect
I may have been arching you may have been arching she may have been arching we may have been arching you may have been arching they may have been arching
Negation
Simple form
I may not arch you may not arch she may not arch we may not arch you may not arch they may not arch
V-ing form
I may not be arching you may not be arching she may not be arching we may not be arching you may not be arching they may not be arching
Perfect
I may not have arched you may not have arched she may not have arched we may not have arched you may not have arched they may not have arched
V-ing perfect
I may not have been arching you may not have been arching she may not have been arching we may not have been arching you may not have been arching they may not have been arching
Interrogative form
Simple form
may I arch? may you arch? may she arch? may we arch? may you arch? may they arch?
V-ing form
may I be arching? may you be arching? may she be arching? may we be arching? may you be arching? may they be arching?
Perfect
may I have arched? may you have arched? may she have arched? may we have arched? may you have arched? may they have arched?
V-ing perfect
may I have been arching? may you have been arching? may she have been arching? may we have been arching? may you have been arching? may they have been arching?
Interro-negative form
Simple form
may I not arch? may you not arch? may she not arch? may we not arch? may you not arch? may they not arch?
V-ing form
may I not be arching? may you not be arching? may she not be arching? may we not be arching? may you not be arching? may they not be arching?
Perfect
may I not have arched? may you not have arched? may she not have arched? may we not have arched? may you not have arched? may they not have arched?
V-ing perfect
may I not have been arching? may you not have been arching? may she not have been arching? may we not have been arching? may you not have been arching? may they not have been arching?