can while
Regular verb: while - whiled- whiled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can while
you can while
she can while
we can while
you can while
they can while 	I can be whiling
you can be whiling
she can be whiling
we can be whiling
you can be whiling
they can be whiling	I can have whiled
you can have whiled
she 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
she 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 	Perfect 	V-ing perfect 	
I can't while
you can't while
she can't while
we can't while
you can't while
they can't while 	I can't be whiling
you can't be whiling
she can't be whiling
we can't be whiling
you can't be whiling
they can't be whiling	I can't have whiled
you can't have whiled
she can't have whiled
we can't have whiled
you can't have whiled
they can't have whiled	I can't have been whiling
you can't have been whiling
she can't have been whiling
we can't have been whiling
you can't have been whiling
they can't have been whiling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I while?
can you while?
can she while?
can we while?
can you while?
can they while? 	can I be whiling?
can you be whiling?
can she be whiling?
can we be whiling?
can you be whiling?
can they be whiling? 	can I have whiled?
can you have whiled?
can she 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 she 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 	Perfect 	V-ing perfect 	
can't I while?
can't you while?
can't she while?
can't we while?
can't you while?
can't they while? 	can't I be whiling?
can't you be whiling?
can't she be whiling?
can't we be whiling?
can't you be whiling?
can't they be whiling? 	can't I have whiled?
can't you have whiled?
can't she have whiled?
can't we have whiled?
can't you have whiled?
can't they have whiled? 	can't I have been whiling?
can't you have been whiling?
can't she have been whiling?
can't we have been whiling?
can't you have been whiling?
can't they have been whiling?