I may clump you may clump he may clump we may clump you may clump they may clump
V-ing form
I may be clumping you may be clumping he may be clumping we may be clumping you may be clumping they may be clumping
Perfect
I may have clumped you may have clumped he may have clumped we may have clumped you may have clumped they may have clumped
V-ing perfect
I may have been clumping you may have been clumping he may have been clumping we may have been clumping you may have been clumping they may have been clumping
Negation
Simple form
I may not clump you may not clump he may not clump we may not clump you may not clump they may not clump
V-ing form
I may not be clumping you may not be clumping he may not be clumping we may not be clumping you may not be clumping they may not be clumping
Perfect
I may not have clumped you may not have clumped he may not have clumped we may not have clumped you may not have clumped they may not have clumped
V-ing perfect
I may not have been clumping you may not have been clumping he may not have been clumping we may not have been clumping you may not have been clumping they may not have been clumping
Interrogative form
Simple form
may I clump? may you clump? may he clump? may we clump? may you clump? may they clump?
V-ing form
may I be clumping? may you be clumping? may he be clumping? may we be clumping? may you be clumping? may they be clumping?
Perfect
may I have clumped? may you have clumped? may he have clumped? may we have clumped? may you have clumped? may they have clumped?
V-ing perfect
may I have been clumping? may you have been clumping? may he have been clumping? may we have been clumping? may you have been clumping? may they have been clumping?
Interro-negative form
Simple form
may I not clump? may you not clump? may he not clump? may we not clump? may you not clump? may they not clump?
V-ing form
may I not be clumping? may you not be clumping? may he not be clumping? may we not be clumping? may you not be clumping? may they not be clumping?
Perfect
may I not have clumped? may you not have clumped? may he not have clumped? may we not have clumped? may you not have clumped? may they not have clumped?
V-ing perfect
may I not have been clumping? may you not have been clumping? may he not have been clumping? may we not have been clumping? may you not have been clumping? may they not have been clumping?