English verb conjugation
CAN SKIM

Regular verb: skim - skimmed - skimmed

Affirmation

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

Negation

Simple form	V-ing form
I can't skim you can't skim he can't skim we can't skim you can't skim they can't skim	I can't be skimming you can't be skimming he can't be skimming we can't be skimming you can't be skimming they can't be skimming
Perfect	V-ing perfect
I can't have skimmed you can't have skimmed he can't have skimmed we can't have skimmed you can't have skimmed they can't have skimmed	I can't have been skimming you can't have been skimming he can't have been skimming we can't have been skimming you can't have been skimming they can't have been skimming

Interrogative form

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

Interro-negative form

Simple form	V-ing form
can't I skim? can't you skim? can't he skim? can't we skim? can't you skim? can't they skim?	can't I be skimming? can't you be skimming? can't he be skimming? can't we be skimming? can't you be skimming? can't they be skimming?
Perfect	V-ing perfect
can't I have skimmed? can't you have skimmed? can't he have skimmed? can't we have skimmed? can't you have skimmed? can't they have skimmed?	can't I have been skimming? can't you have been skimming? can't he have been skimming? can't we have been skimming? can't you have been skimming? can't they have been skimming?