English verb conjugation
CAN UNPILE

Regular verb: unpile - unpiled - unpiled

Affirmation

Simple form	V-ing form
I can unpile you can unpile he can unpile we can unpile you can unpile they can unpile	I can be unpiling you can be unpiling he can be unpiling we can be unpiling you can be unpiling they can be unpiling
Perfect	V-ing perfect
I can have unpiled you can have unpiled he can have unpiled we can have unpiled you can have unpiled they can have unpiled	I can have been unpiling you can have been unpiling he can have been unpiling we can have been unpiling you can have been unpiling they can have been unpiling

Negation

Simple form	V-ing form
I cannot unpile you cannot unpile he cannot unpile we cannot unpile you cannot unpile they cannot unpile	I cannot be unpiling you cannot be unpiling he cannot be unpiling we cannot be unpiling you cannot be unpiling they cannot be unpiling
Perfect	V-ing perfect
I cannot have unpiled you cannot have unpiled he cannot have unpiled we cannot have unpiled you cannot have unpiled they cannot have unpiled	I cannot have been unpiling you cannot have been unpiling he cannot have been unpiling we cannot have been unpiling you cannot have been unpiling they cannot have been unpiling

Interrogative form

Simple form	V-ing form
can I unpile? can you unpile? can he unpile? can we unpile? can you unpile? can they unpile?	can I be unpiling? can you be unpiling? can he be unpiling? can we be unpiling? can you be unpiling? can they be unpiling?
Perfect	V-ing perfect
can I have unpiled? can you have unpiled? can he have unpiled? can we have unpiled? can you have unpiled? can they have unpiled?	can I have been unpiling? can you have been unpiling? can he have been unpiling? can we have been unpiling? can you have been unpiling? can they have been unpiling?

Interro-negative form

Simple form	V-ing form
can I not unpile? can you not unpile? can he not unpile? can we not unpile? can you not unpile? can they not unpile?	can I not be unpiling? can you not be unpiling? can he not be unpiling? can we not be unpiling? can you not be unpiling? can they not be unpiling?
Perfect	V-ing perfect
can I not have unpiled? can you not have unpiled? can he not have unpiled? can we not have unpiled? can you not have unpiled? can they not have unpiled?	can I not have been unpiling? can you not have been unpiling? can he not have been unpiling? can we not have been unpiling? can you not have been unpiling? can they not have been unpiling?