can retrace
Regular verb: retrace - retraced- retraced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can retrace
you can retrace
he can retrace
we can retrace
you can retrace
they can retrace 	I can be retracing
you can be retracing
he can be retracing
we can be retracing
you can be retracing
they can be retracing	I can have retraced
you can have retraced
he can have retraced
we can have retraced
you can have retraced
they can have retraced	I can have been retracing
you can have been retracing
he can have been retracing
we can have been retracing
you can have been retracing
they can have been retracing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot retrace
you cannot retrace
he cannot retrace
we cannot retrace
you cannot retrace
they cannot retrace 	I cannot be retracing
you cannot be retracing
he cannot be retracing
we cannot be retracing
you cannot be retracing
they cannot be retracing	I cannot have retraced
you cannot have retraced
he cannot have retraced
we cannot have retraced
you cannot have retraced
they cannot have retraced	I cannot have been retracing
you cannot have been retracing
he cannot have been retracing
we cannot have been retracing
you cannot have been retracing
they cannot have been retracing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I retrace?
can you retrace?
can he retrace?
can we retrace?
can you retrace?
can they retrace? 	can I be retracing?
can you be retracing?
can he be retracing?
can we be retracing?
can you be retracing?
can they be retracing? 	can I have retraced?
can you have retraced?
can he have retraced?
can we have retraced?
can you have retraced?
can they have retraced? 	can I have been retracing?
can you have been retracing?
can he have been retracing?
can we have been retracing?
can you have been retracing?
can they have been retracing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not retrace?
can you not retrace?
can he not retrace?
can we not retrace?
can you not retrace?
can they not retrace? 	can I not be retracing?
can you not be retracing?
can he not be retracing?
can we not be retracing?
can you not be retracing?
can they not be retracing? 	can I not have retraced?
can you not have retraced?
can he not have retraced?
can we not have retraced?
can you not have retraced?
can they not have retraced? 	can I not have been retracing?
can you not have been retracing?
can he not have been retracing?
can we not have been retracing?
can you not have been retracing?
can they not have been retracing?