can flunk
Regular verb: flunk - flunked- flunked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can flunk
you can flunk
she can flunk
we can flunk
you can flunk
they can flunk 	I can be flunking
you can be flunking
she can be flunking
we can be flunking
you can be flunking
they can be flunking	I can have flunked
you can have flunked
she can have flunked
we can have flunked
you can have flunked
they can have flunked	I can have been flunking
you can have been flunking
she can have been flunking
we can have been flunking
you can have been flunking
they can have been flunking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't flunk
you can't flunk
she can't flunk
we can't flunk
you can't flunk
they can't flunk 	I can't be flunking
you can't be flunking
she can't be flunking
we can't be flunking
you can't be flunking
they can't be flunking	I can't have flunked
you can't have flunked
she can't have flunked
we can't have flunked
you can't have flunked
they can't have flunked	I can't have been flunking
you can't have been flunking
she can't have been flunking
we can't have been flunking
you can't have been flunking
they can't have been flunking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I flunk?
can you flunk?
can she flunk?
can we flunk?
can you flunk?
can they flunk? 	can I be flunking?
can you be flunking?
can she be flunking?
can we be flunking?
can you be flunking?
can they be flunking? 	can I have flunked?
can you have flunked?
can she have flunked?
can we have flunked?
can you have flunked?
can they have flunked? 	can I have been flunking?
can you have been flunking?
can she have been flunking?
can we have been flunking?
can you have been flunking?
can they have been flunking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I flunk?
can't you flunk?
can't she flunk?
can't we flunk?
can't you flunk?
can't they flunk? 	can't I be flunking?
can't you be flunking?
can't she be flunking?
can't we be flunking?
can't you be flunking?
can't they be flunking? 	can't I have flunked?
can't you have flunked?
can't she have flunked?
can't we have flunked?
can't you have flunked?
can't they have flunked? 	can't I have been flunking?
can't you have been flunking?
can't she have been flunking?
can't we have been flunking?
can't you have been flunking?
can't they have been flunking?