can conk
Regular verb: conk - conked- conked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can conk
you can conk
he can conk
we can conk
you can conk
they can conk 	I can be conking
you can be conking
he can be conking
we can be conking
you can be conking
they can be conking	I can have conked
you can have conked
he can have conked
we can have conked
you can have conked
they can have conked	I can have been conking
you can have been conking
he can have been conking
we can have been conking
you can have been conking
they can have been conking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't conk
you can't conk
he can't conk
we can't conk
you can't conk
they can't conk 	I can't be conking
you can't be conking
he can't be conking
we can't be conking
you can't be conking
they can't be conking	I can't have conked
you can't have conked
he can't have conked
we can't have conked
you can't have conked
they can't have conked	I can't have been conking
you can't have been conking
he can't have been conking
we can't have been conking
you can't have been conking
they can't have been conking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I conk?
can you conk?
can he conk?
can we conk?
can you conk?
can they conk? 	can I be conking?
can you be conking?
can he be conking?
can we be conking?
can you be conking?
can they be conking? 	can I have conked?
can you have conked?
can he have conked?
can we have conked?
can you have conked?
can they have conked? 	can I have been conking?
can you have been conking?
can he have been conking?
can we have been conking?
can you have been conking?
can they have been conking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I conk?
can't you conk?
can't he conk?
can't we conk?
can't you conk?
can't they conk? 	can't I be conking?
can't you be conking?
can't he be conking?
can't we be conking?
can't you be conking?
can't they be conking? 	can't I have conked?
can't you have conked?
can't he have conked?
can't we have conked?
can't you have conked?
can't they have conked? 	can't I have been conking?
can't you have been conking?
can't he have been conking?
can't we have been conking?
can't you have been conking?
can't they have been conking?