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 can't retrace
you can't retrace
he can't retrace
we can't retrace
you can't retrace
they can't retrace 	I can't be retracing
you can't be retracing
he can't be retracing
we can't be retracing
you can't be retracing
they can't be retracing	I can't have retraced
you can't have retraced
he can't have retraced
we can't have retraced
you can't have retraced
they can't have retraced	I can't have been retracing
you can't have been retracing
he can't have been retracing
we can't have been retracing
you can't have been retracing
they can't 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't I retrace?
can't you retrace?
can't he retrace?
can't we retrace?
can't you retrace?
can't they retrace? 	can't I be retracing?
can't you be retracing?
can't he be retracing?
can't we be retracing?
can't you be retracing?
can't they be retracing? 	can't I have retraced?
can't you have retraced?
can't he have retraced?
can't we have retraced?
can't you have retraced?
can't they have retraced? 	can't I have been retracing?
can't you have been retracing?
can't he have been retracing?
can't we have been retracing?
can't you have been retracing?
can't they have been retracing?