I may grab you may grab she may grab we may grab you may grab they may grab
V-ing form
I may be grabbing you may be grabbing she may be grabbing we may be grabbing you may be grabbing they may be grabbing
Perfect
I may have grabbed you may have grabbed she may have grabbed we may have grabbed you may have grabbed they may have grabbed
V-ing perfect
I may have been grabbing you may have been grabbing she may have been grabbing we may have been grabbing you may have been grabbing they may have been grabbing
Negation
Simple form
I mayn't grab you mayn't grab she mayn't grab we mayn't grab you mayn't grab they mayn't grab
V-ing form
I mayn't be grabbing you mayn't be grabbing she mayn't be grabbing we mayn't be grabbing you mayn't be grabbing they mayn't be grabbing
Perfect
I mayn't have grabbed you mayn't have grabbed she mayn't have grabbed we mayn't have grabbed you mayn't have grabbed they mayn't have grabbed
V-ing perfect
I mayn't have been grabbing you mayn't have been grabbing she mayn't have been grabbing we mayn't have been grabbing you mayn't have been grabbing they mayn't have been grabbing
Interrogative form
Simple form
may I grab? may you grab? may she grab? may we grab? may you grab? may they grab?
V-ing form
may I be grabbing? may you be grabbing? may she be grabbing? may we be grabbing? may you be grabbing? may they be grabbing?
Perfect
may I have grabbed? may you have grabbed? may she have grabbed? may we have grabbed? may you have grabbed? may they have grabbed?
V-ing perfect
may I have been grabbing? may you have been grabbing? may she have been grabbing? may we have been grabbing? may you have been grabbing? may they have been grabbing?
Interro-negative form
Simple form
mayn't I grab? mayn't you grab? mayn't she grab? mayn't we grab? mayn't you grab? mayn't they grab?
V-ing form
mayn't I be grabbing? mayn't you be grabbing? mayn't she be grabbing? mayn't we be grabbing? mayn't you be grabbing? mayn't they be grabbing?
Perfect
mayn't I have grabbed? mayn't you have grabbed? mayn't she have grabbed? mayn't we have grabbed? mayn't you have grabbed? mayn't they have grabbed?
V-ing perfect
mayn't I have been grabbing? mayn't you have been grabbing? mayn't she have been grabbing? mayn't we have been grabbing? mayn't you have been grabbing? mayn't they have been grabbing?