can windsurf
Regular verb: windsurf - windsurfed- windsurfed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can windsurf
you can windsurf
he can windsurf
we can windsurf
you can windsurf
they can windsurf 	I can be windsurfing
you can be windsurfing
he can be windsurfing
we can be windsurfing
you can be windsurfing
they can be windsurfing	I can have windsurfed
you can have windsurfed
he can have windsurfed
we can have windsurfed
you can have windsurfed
they can have windsurfed	I can have been windsurfing
you can have been windsurfing
he can have been windsurfing
we can have been windsurfing
you can have been windsurfing
they can have been windsurfing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot windsurf
you cannot windsurf
he cannot windsurf
we cannot windsurf
you cannot windsurf
they cannot windsurf 	I cannot be windsurfing
you cannot be windsurfing
he cannot be windsurfing
we cannot be windsurfing
you cannot be windsurfing
they cannot be windsurfing	I cannot have windsurfed
you cannot have windsurfed
he cannot have windsurfed
we cannot have windsurfed
you cannot have windsurfed
they cannot have windsurfed	I cannot have been windsurfing
you cannot have been windsurfing
he cannot have been windsurfing
we cannot have been windsurfing
you cannot have been windsurfing
they cannot have been windsurfing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I windsurf?
can you windsurf?
can he windsurf?
can we windsurf?
can you windsurf?
can they windsurf? 	can I be windsurfing?
can you be windsurfing?
can he be windsurfing?
can we be windsurfing?
can you be windsurfing?
can they be windsurfing? 	can I have windsurfed?
can you have windsurfed?
can he have windsurfed?
can we have windsurfed?
can you have windsurfed?
can they have windsurfed? 	can I have been windsurfing?
can you have been windsurfing?
can he have been windsurfing?
can we have been windsurfing?
can you have been windsurfing?
can they have been windsurfing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not windsurf?
can you not windsurf?
can he not windsurf?
can we not windsurf?
can you not windsurf?
can they not windsurf? 	can I not be windsurfing?
can you not be windsurfing?
can he not be windsurfing?
can we not be windsurfing?
can you not be windsurfing?
can they not be windsurfing? 	can I not have windsurfed?
can you not have windsurfed?
can he not have windsurfed?
can we not have windsurfed?
can you not have windsurfed?
can they not have windsurfed? 	can I not have been windsurfing?
can you not have been windsurfing?
can he not have been windsurfing?
can we not have been windsurfing?
can you not have been windsurfing?
can they not have been windsurfing?