I can skim you can skim he can skim we can skim you can skim they can skim
Forma con V-ing
I can be skimming you can be skimming he can be skimming we can be skimming you can be skimming they can be skimming
Perfecto
I can have skimmed you can have skimmed he can have skimmed we can have skimmed you can have skimmed they can have skimmed
Perfecto con V-ing
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
Negación
Forma simple
I cannot skim you cannot skim he cannot skim we cannot skim you cannot skim they cannot skim
Forma con V-ing
I cannot be skimming you cannot be skimming he cannot be skimming we cannot be skimming you cannot be skimming they cannot be skimming
Perfecto
I cannot have skimmed you cannot have skimmed he cannot have skimmed we cannot have skimmed you cannot have skimmed they cannot have skimmed
Perfecto con V-ing
I cannot have been skimming you cannot have been skimming he cannot have been skimming we cannot have been skimming you cannot have been skimming they cannot have been skimming
Forma interrogativa
Forma simple
can I skim? can you skim? can he skim? can we skim? can you skim? can they skim?
Forma con V-ing
can I be skimming? can you be skimming? can he be skimming? can we be skimming? can you be skimming? can they be skimming?
Perfecto
can I have skimmed? can you have skimmed? can he have skimmed? can we have skimmed? can you have skimmed? can they have skimmed?
Perfecto con V-ing
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?
Forma interro-negativa
Forma simple
can I not skim? can you not skim? can he not skim? can we not skim? can you not skim? can they not skim?
Forma con V-ing
can I not be skimming? can you not be skimming? can he not be skimming? can we not be skimming? can you not be skimming? can they not be skimming?
Perfecto
can I not have skimmed? can you not have skimmed? can he not have skimmed? can we not have skimmed? can you not have skimmed? can they not have skimmed?
Perfecto con V-ing
can I not have been skimming? can you not have been skimming? can he not have been skimming? can we not have been skimming? can you not have been skimming? can they not have been skimming?