I can trace you can trace he can trace we can trace you can trace they can trace
Forma con V-ing
I can be tracing you can be tracing he can be tracing we can be tracing you can be tracing they can be tracing
Perfecto
I can have traced you can have traced he can have traced we can have traced you can have traced they can have traced
Perfecto con V-ing
I can have been tracing you can have been tracing he can have been tracing we can have been tracing you can have been tracing they can have been tracing
Negación
Forma simple
I cannot trace you cannot trace he cannot trace we cannot trace you cannot trace they cannot trace
Forma con V-ing
I cannot be tracing you cannot be tracing he cannot be tracing we cannot be tracing you cannot be tracing they cannot be tracing
Perfecto
I cannot have traced you cannot have traced he cannot have traced we cannot have traced you cannot have traced they cannot have traced
Perfecto con V-ing
I cannot have been tracing you cannot have been tracing he cannot have been tracing we cannot have been tracing you cannot have been tracing they cannot have been tracing
Forma interrogativa
Forma simple
can I trace? can you trace? can he trace? can we trace? can you trace? can they trace?
Forma con V-ing
can I be tracing? can you be tracing? can he be tracing? can we be tracing? can you be tracing? can they be tracing?
Perfecto
can I have traced? can you have traced? can he have traced? can we have traced? can you have traced? can they have traced?
Perfecto con V-ing
can I have been tracing? can you have been tracing? can he have been tracing? can we have been tracing? can you have been tracing? can they have been tracing?
Forma interro-negativa
Forma simple
can I not trace? can you not trace? can he not trace? can we not trace? can you not trace? can they not trace?
Forma con V-ing
can I not be tracing? can you not be tracing? can he not be tracing? can we not be tracing? can you not be tracing? can they not be tracing?
Perfecto
can I not have traced? can you not have traced? can he not have traced? can we not have traced? can you not have traced? can they not have traced?
Perfecto con V-ing
can I not have been tracing? can you not have been tracing? can he not have been tracing? can we not have been tracing? can you not have been tracing? can they not have been tracing?