can spar
Regular verb: spar - sparred- sparred

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can spar
you can spar
she can spar
we can spar
you can spar
they can spar 	I can be sparring
you can be sparring
she can be sparring
we can be sparring
you can be sparring
they can be sparring	I can have sparred
you can have sparred
she can have sparred
we can have sparred
you can have sparred
they can have sparred	I can have been sparring
you can have been sparring
she can have been sparring
we can have been sparring
you can have been sparring
they can have been sparring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't spar
you can't spar
she can't spar
we can't spar
you can't spar
they can't spar 	I can't be sparring
you can't be sparring
she can't be sparring
we can't be sparring
you can't be sparring
they can't be sparring	I can't have sparred
you can't have sparred
she can't have sparred
we can't have sparred
you can't have sparred
they can't have sparred	I can't have been sparring
you can't have been sparring
she can't have been sparring
we can't have been sparring
you can't have been sparring
they can't have been sparring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I spar?
can you spar?
can she spar?
can we spar?
can you spar?
can they spar? 	can I be sparring?
can you be sparring?
can she be sparring?
can we be sparring?
can you be sparring?
can they be sparring? 	can I have sparred?
can you have sparred?
can she have sparred?
can we have sparred?
can you have sparred?
can they have sparred? 	can I have been sparring?
can you have been sparring?
can she have been sparring?
can we have been sparring?
can you have been sparring?
can they have been sparring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I spar?
can't you spar?
can't she spar?
can't we spar?
can't you spar?
can't they spar? 	can't I be sparring?
can't you be sparring?
can't she be sparring?
can't we be sparring?
can't you be sparring?
can't they be sparring? 	can't I have sparred?
can't you have sparred?
can't she have sparred?
can't we have sparred?
can't you have sparred?
can't they have sparred? 	can't I have been sparring?
can't you have been sparring?
can't she have been sparring?
can't we have been sparring?
can't you have been sparring?
can't they have been sparring?