English verb conjugation
MUST SKIM

Regular verb: skim - skimmed - skimmed

Affirmation

Simple form	V-ing form
I must skim you must skim he must skim we must skim you must skim they must skim	I must be skimming you must be skimming he must be skimming we must be skimming you must be skimming they must be skimming
Perfect	V-ing perfect
I must have skimmed you must have skimmed he must have skimmed we must have skimmed you must have skimmed they must have skimmed	I must have been skimming you must have been skimming he must have been skimming we must have been skimming you must have been skimming they must have been skimming

Negation

Simple form	V-ing form
I must not skim you must not skim he must not skim we must not skim you must not skim they must not skim	I must not be skimming you must not be skimming he must not be skimming we must not be skimming you must not be skimming they must not be skimming
Perfect	V-ing perfect
I must not have skimmed you must not have skimmed he must not have skimmed we must not have skimmed you must not have skimmed they must not have skimmed	I must not have been skimming you must not have been skimming he must not have been skimming we must not have been skimming you must not have been skimming they must not have been skimming

Interrogative form

Simple form	V-ing form
must I skim? must you skim? must he skim? must we skim? must you skim? must they skim?	must I be skimming? must you be skimming? must he be skimming? must we be skimming? must you be skimming? must they be skimming?
Perfect	V-ing perfect
must I have skimmed? must you have skimmed? must he have skimmed? must we have skimmed? must you have skimmed? must they have skimmed?	must I have been skimming? must you have been skimming? must he have been skimming? must we have been skimming? must you have been skimming? must they have been skimming?

Interro-negative form

Simple form	V-ing form
must I not skim? must you not skim? must he not skim? must we not skim? must you not skim? must they not skim?	must I not be skimming? must you not be skimming? must he not be skimming? must we not be skimming? must you not be skimming? must they not be skimming?
Perfect	V-ing perfect
must I not have skimmed? must you not have skimmed? must he not have skimmed? must we not have skimmed? must you not have skimmed? must they not have skimmed?	must I not have been skimming? must you not have been skimming? must he not have been skimming? must we not have been skimming? must you not have been skimming? must they not have been skimming?