English verb conjugation
CAN WHILE

Regular verb: while - whiled - whiled

Affirmation

Simple form	V-ing form
I can while you can while he can while we can while you can while they can while	I can be whiling you can be whiling he can be whiling we can be whiling you can be whiling they can be whiling
Perfect	V-ing perfect
I can have whiled you can have whiled he can have whiled we can have whiled you can have whiled they can have whiled	I can have been whiling you can have been whiling he can have been whiling we can have been whiling you can have been whiling they can have been whiling

Negation

Simple form	V-ing form
I cannot while you cannot while he cannot while we cannot while you cannot while they cannot while	I cannot be whiling you cannot be whiling he cannot be whiling we cannot be whiling you cannot be whiling they cannot be whiling
Perfect	V-ing perfect
I cannot have whiled you cannot have whiled he cannot have whiled we cannot have whiled you cannot have whiled they cannot have whiled	I cannot have been whiling you cannot have been whiling he cannot have been whiling we cannot have been whiling you cannot have been whiling they cannot have been whiling

Interrogative form

Simple form	V-ing form
can I while? can you while? can he while? can we while? can you while? can they while?	can I be whiling? can you be whiling? can he be whiling? can we be whiling? can you be whiling? can they be whiling?
Perfect	V-ing perfect
can I have whiled? can you have whiled? can he have whiled? can we have whiled? can you have whiled? can they have whiled?	can I have been whiling? can you have been whiling? can he have been whiling? can we have been whiling? can you have been whiling? can they have been whiling?

Interro-negative form

Simple form	V-ing form
can I not while? can you not while? can he not while? can we not while? can you not while? can they not while?	can I not be whiling? can you not be whiling? can he not be whiling? can we not be whiling? can you not be whiling? can they not be whiling?
Perfect	V-ing perfect
can I not have whiled? can you not have whiled? can he not have whiled? can we not have whiled? can you not have whiled? can they not have whiled?	can I not have been whiling? can you not have been whiling? can he not have been whiling? can we not have been whiling? can you not have been whiling? can they not have been whiling?