can sand
Regular verb: sand - sanded- sanded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can sand
you can sand
she can sand
we can sand
you can sand
they can sand 	I can be sanding
you can be sanding
she can be sanding
we can be sanding
you can be sanding
they can be sanding	I can have sanded
you can have sanded
she can have sanded
we can have sanded
you can have sanded
they can have sanded	I can have been sanding
you can have been sanding
she can have been sanding
we can have been sanding
you can have been sanding
they can have been sanding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't sand
you can't sand
she can't sand
we can't sand
you can't sand
they can't sand 	I can't be sanding
you can't be sanding
she can't be sanding
we can't be sanding
you can't be sanding
they can't be sanding	I can't have sanded
you can't have sanded
she can't have sanded
we can't have sanded
you can't have sanded
they can't have sanded	I can't have been sanding
you can't have been sanding
she can't have been sanding
we can't have been sanding
you can't have been sanding
they can't have been sanding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I sand?
can you sand?
can she sand?
can we sand?
can you sand?
can they sand? 	can I be sanding?
can you be sanding?
can she be sanding?
can we be sanding?
can you be sanding?
can they be sanding? 	can I have sanded?
can you have sanded?
can she have sanded?
can we have sanded?
can you have sanded?
can they have sanded? 	can I have been sanding?
can you have been sanding?
can she have been sanding?
can we have been sanding?
can you have been sanding?
can they have been sanding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I sand?
can't you sand?
can't she sand?
can't we sand?
can't you sand?
can't they sand? 	can't I be sanding?
can't you be sanding?
can't she be sanding?
can't we be sanding?
can't you be sanding?
can't they be sanding? 	can't I have sanded?
can't you have sanded?
can't she have sanded?
can't we have sanded?
can't you have sanded?
can't they have sanded? 	can't I have been sanding?
can't you have been sanding?
can't she have been sanding?
can't we have been sanding?
can't you have been sanding?
can't they have been sanding?