I may grab you may grab he may grab we may grab you may grab they may grab
V-ing form
I may be grabbing you may be grabbing he may be grabbing we may be grabbing you may be grabbing they may be grabbing
Perfect
I may have grabbed you may have grabbed he 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 he may have been grabbing we may have been grabbing you may have been grabbing they may have been grabbing
Negation
Simple form
I may not grab you may not grab he may not grab we may not grab you may not grab they may not grab
V-ing form
I may not be grabbing you may not be grabbing he may not be grabbing we may not be grabbing you may not be grabbing they may not be grabbing
Perfect
I may not have grabbed you may not have grabbed he may not have grabbed we may not have grabbed you may not have grabbed they may not have grabbed
V-ing perfect
I may not have been grabbing you may not have been grabbing he may not have been grabbing we may not have been grabbing you may not have been grabbing they may not have been grabbing
Interrogative form
Simple form
may I grab? may you grab? may he grab? may we grab? may you grab? may they grab?
V-ing form
may I be grabbing? may you be grabbing? may he be grabbing? may we be grabbing? may you be grabbing? may they be grabbing?
Perfect
may I have grabbed? may you have grabbed? may he 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 he have been grabbing? may we have been grabbing? may you have been grabbing? may they have been grabbing?
Interro-negative form
Simple form
may I not grab? may you not grab? may he not grab? may we not grab? may you not grab? may they not grab?
V-ing form
may I not be grabbing? may you not be grabbing? may he not be grabbing? may we not be grabbing? may you not be grabbing? may they not be grabbing?
Perfect
may I not have grabbed? may you not have grabbed? may he not have grabbed? may we not have grabbed? may you not have grabbed? may they not have grabbed?
V-ing perfect
may I not have been grabbing? may you not have been grabbing? may he not have been grabbing? may we not have been grabbing? may you not have been grabbing? may they not have been grabbing?