can trace
Regular verb: trace - traced- traced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can trace
you can trace
she can trace
we can trace
you can trace
they can trace 	I can be tracing
you can be tracing
she can be tracing
we can be tracing
you can be tracing
they can be tracing	I can have traced
you can have traced
she can have traced
we can have traced
you can have traced
they can have traced	I can have been tracing
you can have been tracing
she can have been tracing
we can have been tracing
you can have been tracing
they can have been tracing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot trace
you cannot trace
she cannot trace
we cannot trace
you cannot trace
they cannot trace 	I cannot be tracing
you cannot be tracing
she cannot be tracing
we cannot be tracing
you cannot be tracing
they cannot be tracing	I cannot have traced
you cannot have traced
she cannot have traced
we cannot have traced
you cannot have traced
they cannot have traced	I cannot have been tracing
you cannot have been tracing
she cannot have been tracing
we cannot have been tracing
you cannot have been tracing
they cannot have been tracing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I trace?
can you trace?
can she trace?
can we trace?
can you trace?
can they trace? 	can I be tracing?
can you be tracing?
can she be tracing?
can we be tracing?
can you be tracing?
can they be tracing? 	can I have traced?
can you have traced?
can she have traced?
can we have traced?
can you have traced?
can they have traced? 	can I have been tracing?
can you have been tracing?
can she have been tracing?
can we have been tracing?
can you have been tracing?
can they have been tracing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not trace?
can you not trace?
can she not trace?
can we not trace?
can you not trace?
can they not trace? 	can I not be tracing?
can you not be tracing?
can she not be tracing?
can we not be tracing?
can you not be tracing?
can they not be tracing? 	can I not have traced?
can you not have traced?
can she not have traced?
can we not have traced?
can you not have traced?
can they not have traced? 	can I not have been tracing?
can you not have been tracing?
can she not have been tracing?
can we not have been tracing?
can you not have been tracing?
can they not have been tracing?