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 can't trace
you can't trace
she can't trace
we can't trace
you can't trace
they can't trace 	I can't be tracing
you can't be tracing
she can't be tracing
we can't be tracing
you can't be tracing
they can't be tracing	I can't have traced
you can't have traced
she can't have traced
we can't have traced
you can't have traced
they can't have traced	I can't have been tracing
you can't have been tracing
she can't have been tracing
we can't have been tracing
you can't have been tracing
they can't 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't I trace?
can't you trace?
can't she trace?
can't we trace?
can't you trace?
can't they trace? 	can't I be tracing?
can't you be tracing?
can't she be tracing?
can't we be tracing?
can't you be tracing?
can't they be tracing? 	can't I have traced?
can't you have traced?
can't she have traced?
can't we have traced?
can't you have traced?
can't they have traced? 	can't I have been tracing?
can't you have been tracing?
can't she have been tracing?
can't we have been tracing?
can't you have been tracing?
can't they have been tracing?