can shark
Regular verb: shark - sharked- sharked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can shark
you can shark
she can shark
we can shark
you can shark
they can shark 	I can be sharking
you can be sharking
she can be sharking
we can be sharking
you can be sharking
they can be sharking	I can have sharked
you can have sharked
she can have sharked
we can have sharked
you can have sharked
they can have sharked	I can have been sharking
you can have been sharking
she can have been sharking
we can have been sharking
you can have been sharking
they can have been sharking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't shark
you can't shark
she can't shark
we can't shark
you can't shark
they can't shark 	I can't be sharking
you can't be sharking
she can't be sharking
we can't be sharking
you can't be sharking
they can't be sharking	I can't have sharked
you can't have sharked
she can't have sharked
we can't have sharked
you can't have sharked
they can't have sharked	I can't have been sharking
you can't have been sharking
she can't have been sharking
we can't have been sharking
you can't have been sharking
they can't have been sharking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I shark?
can you shark?
can she shark?
can we shark?
can you shark?
can they shark? 	can I be sharking?
can you be sharking?
can she be sharking?
can we be sharking?
can you be sharking?
can they be sharking? 	can I have sharked?
can you have sharked?
can she have sharked?
can we have sharked?
can you have sharked?
can they have sharked? 	can I have been sharking?
can you have been sharking?
can she have been sharking?
can we have been sharking?
can you have been sharking?
can they have been sharking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I shark?
can't you shark?
can't she shark?
can't we shark?
can't you shark?
can't they shark? 	can't I be sharking?
can't you be sharking?
can't she be sharking?
can't we be sharking?
can't you be sharking?
can't they be sharking? 	can't I have sharked?
can't you have sharked?
can't she have sharked?
can't we have sharked?
can't you have sharked?
can't they have sharked? 	can't I have been sharking?
can't you have been sharking?
can't she have been sharking?
can't we have been sharking?
can't you have been sharking?
can't they have been sharking?