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 can't windsurf
you can't windsurf
he can't windsurf
we can't windsurf
you can't windsurf
they can't windsurf 	I can't be windsurfing
you can't be windsurfing
he can't be windsurfing
we can't be windsurfing
you can't be windsurfing
they can't be windsurfing	I can't have windsurfed
you can't have windsurfed
he can't have windsurfed
we can't have windsurfed
you can't have windsurfed
they can't have windsurfed	I can't have been windsurfing
you can't have been windsurfing
he can't have been windsurfing
we can't have been windsurfing
you can't have been windsurfing
they can't 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't I windsurf?
can't you windsurf?
can't he windsurf?
can't we windsurf?
can't you windsurf?
can't they windsurf? 	can't I be windsurfing?
can't you be windsurfing?
can't he be windsurfing?
can't we be windsurfing?
can't you be windsurfing?
can't they be windsurfing? 	can't I have windsurfed?
can't you have windsurfed?
can't he have windsurfed?
can't we have windsurfed?
can't you have windsurfed?
can't they have windsurfed? 	can't I have been windsurfing?
can't you have been windsurfing?
can't he have been windsurfing?
can't we have been windsurfing?
can't you have been windsurfing?
can't they have been windsurfing?