I may gravel you may gravel he may gravel we may gravel you may gravel they may gravel
V-ing form
I may be gravelling you may be gravelling he may be gravelling we may be gravelling you may be gravelling they may be gravelling
Perfect
I may have gravelled you may have gravelled he may have gravelled we may have gravelled you may have gravelled they may have gravelled
V-ing perfect
I may have been gravelling you may have been gravelling he may have been gravelling we may have been gravelling you may have been gravelling they may have been gravelling
Negation
Simple form
I may not gravel you may not gravel he may not gravel we may not gravel you may not gravel they may not gravel
V-ing form
I may not be gravelling you may not be gravelling he may not be gravelling we may not be gravelling you may not be gravelling they may not be gravelling
Perfect
I may not have gravelled you may not have gravelled he may not have gravelled we may not have gravelled you may not have gravelled they may not have gravelled
V-ing perfect
I may not have been gravelling you may not have been gravelling he may not have been gravelling we may not have been gravelling you may not have been gravelling they may not have been gravelling
Interrogative form
Simple form
may I gravel? may you gravel? may he gravel? may we gravel? may you gravel? may they gravel?
V-ing form
may I be gravelling? may you be gravelling? may he be gravelling? may we be gravelling? may you be gravelling? may they be gravelling?
Perfect
may I have gravelled? may you have gravelled? may he have gravelled? may we have gravelled? may you have gravelled? may they have gravelled?
V-ing perfect
may I have been gravelling? may you have been gravelling? may he have been gravelling? may we have been gravelling? may you have been gravelling? may they have been gravelling?
Interro-negative form
Simple form
may I not gravel? may you not gravel? may he not gravel? may we not gravel? may you not gravel? may they not gravel?
V-ing form
may I not be gravelling? may you not be gravelling? may he not be gravelling? may we not be gravelling? may you not be gravelling? may they not be gravelling?
Perfect
may I not have gravelled? may you not have gravelled? may he not have gravelled? may we not have gravelled? may you not have gravelled? may they not have gravelled?
V-ing perfect
may I not have been gravelling? may you not have been gravelling? may he not have been gravelling? may we not have been gravelling? may you not have been gravelling? may they not have been gravelling?