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 can't unpile you can't unpile he can't unpile we can't unpile you can't unpile they can't unpile	I can't be unpiling you can't be unpiling he can't be unpiling we can't be unpiling you can't be unpiling they can't be unpiling
Perfect	V-ing perfect
I can't have unpiled you can't have unpiled he can't have unpiled we can't have unpiled you can't have unpiled they can't have unpiled	I can't have been unpiling you can't have been unpiling he can't have been unpiling we can't have been unpiling you can't have been unpiling they can't 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't I unpile? can't you unpile? can't he unpile? can't we unpile? can't you unpile? can't they unpile?	can't I be unpiling? can't you be unpiling? can't he be unpiling? can't we be unpiling? can't you be unpiling? can't they be unpiling?
Perfect	V-ing perfect
can't I have unpiled? can't you have unpiled? can't he have unpiled? can't we have unpiled? can't you have unpiled? can't they have unpiled?	can't I have been unpiling? can't you have been unpiling? can't he have been unpiling? can't we have been unpiling? can't you have been unpiling? can't they have been unpiling?