can quad
Regular verb: quad - quaded- quaded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can quad
you can quad
she can quad
we can quad
you can quad
they can quad 	I can be quading
you can be quading
she can be quading
we can be quading
you can be quading
they can be quading	I can have quaded
you can have quaded
she can have quaded
we can have quaded
you can have quaded
they can have quaded	I can have been quading
you can have been quading
she can have been quading
we can have been quading
you can have been quading
they can have been quading	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot quad
you cannot quad
she cannot quad
we cannot quad
you cannot quad
they cannot quad 	I cannot be quading
you cannot be quading
she cannot be quading
we cannot be quading
you cannot be quading
they cannot be quading	I cannot have quaded
you cannot have quaded
she cannot have quaded
we cannot have quaded
you cannot have quaded
they cannot have quaded	I cannot have been quading
you cannot have been quading
she cannot have been quading
we cannot have been quading
you cannot have been quading
they cannot have been quading	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I quad?
can you quad?
can she quad?
can we quad?
can you quad?
can they quad? 	can I be quading?
can you be quading?
can she be quading?
can we be quading?
can you be quading?
can they be quading? 	can I have quaded?
can you have quaded?
can she have quaded?
can we have quaded?
can you have quaded?
can they have quaded? 	can I have been quading?
can you have been quading?
can she have been quading?
can we have been quading?
can you have been quading?
can they have been quading? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not quad?
can you not quad?
can she not quad?
can we not quad?
can you not quad?
can they not quad? 	can I not be quading?
can you not be quading?
can she not be quading?
can we not be quading?
can you not be quading?
can they not be quading? 	can I not have quaded?
can you not have quaded?
can she not have quaded?
can we not have quaded?
can you not have quaded?
can they not have quaded? 	can I not have been quading?
can you not have been quading?
can she not have been quading?
can we not have been quading?
can you not have been quading?
can they not have been quading?