I may skim you may skim he may skim we may skim you may skim they may skim
V-ing form
I may be skimming you may be skimming he may be skimming we may be skimming you may be skimming they may be skimming
Perfect
I may have skimmed you may have skimmed he may have skimmed we may have skimmed you may have skimmed they may have skimmed
V-ing perfect
I may have been skimming you may have been skimming he may have been skimming we may have been skimming you may have been skimming they may have been skimming
Negation
Simple form
I may not skim you may not skim he may not skim we may not skim you may not skim they may not skim
V-ing form
I may not be skimming you may not be skimming he may not be skimming we may not be skimming you may not be skimming they may not be skimming
Perfect
I may not have skimmed you may not have skimmed he may not have skimmed we may not have skimmed you may not have skimmed they may not have skimmed
V-ing perfect
I may not have been skimming you may not have been skimming he may not have been skimming we may not have been skimming you may not have been skimming they may not have been skimming
Interrogative form
Simple form
may I skim? may you skim? may he skim? may we skim? may you skim? may they skim?
V-ing form
may I be skimming? may you be skimming? may he be skimming? may we be skimming? may you be skimming? may they be skimming?
Perfect
may I have skimmed? may you have skimmed? may he have skimmed? may we have skimmed? may you have skimmed? may they have skimmed?
V-ing perfect
may I have been skimming? may you have been skimming? may he have been skimming? may we have been skimming? may you have been skimming? may they have been skimming?
Interro-negative form
Simple form
may I not skim? may you not skim? may he not skim? may we not skim? may you not skim? may they not skim?
V-ing form
may I not be skimming? may you not be skimming? may he not be skimming? may we not be skimming? may you not be skimming? may they not be skimming?
Perfect
may I not have skimmed? may you not have skimmed? may he not have skimmed? may we not have skimmed? may you not have skimmed? may they not have skimmed?
V-ing perfect
may I not have been skimming? may you not have been skimming? may he not have been skimming? may we not have been skimming? may you not have been skimming? may they not have been skimming?