can tremble
Verbo regular: tremble - trembled- trembled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can tremble
you can tremble
he can tremble
we can tremble
you can tremble
they can tremble 	I can be trembling
you can be trembling
he can be trembling
we can be trembling
you can be trembling
they can be trembling	I can have trembled
you can have trembled
he can have trembled
we can have trembled
you can have trembled
they can have trembled	I can have been trembling
you can have been trembling
he can have been trembling
we can have been trembling
you can have been trembling
they can have been trembling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot tremble
you cannot tremble
he cannot tremble
we cannot tremble
you cannot tremble
they cannot tremble 	I cannot be trembling
you cannot be trembling
he cannot be trembling
we cannot be trembling
you cannot be trembling
they cannot be trembling	I cannot have trembled
you cannot have trembled
he cannot have trembled
we cannot have trembled
you cannot have trembled
they cannot have trembled	I cannot have been trembling
you cannot have been trembling
he cannot have been trembling
we cannot have been trembling
you cannot have been trembling
they cannot have been trembling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I tremble?
can you tremble?
can he tremble?
can we tremble?
can you tremble?
can they tremble? 	can I be trembling?
can you be trembling?
can he be trembling?
can we be trembling?
can you be trembling?
can they be trembling? 	can I have trembled?
can you have trembled?
can he have trembled?
can we have trembled?
can you have trembled?
can they have trembled? 	can I have been trembling?
can you have been trembling?
can he have been trembling?
can we have been trembling?
can you have been trembling?
can they have been trembling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not tremble?
can you not tremble?
can he not tremble?
can we not tremble?
can you not tremble?
can they not tremble? 	can I not be trembling?
can you not be trembling?
can he not be trembling?
can we not be trembling?
can you not be trembling?
can they not be trembling? 	can I not have trembled?
can you not have trembled?
can he not have trembled?
can we not have trembled?
can you not have trembled?
can they not have trembled? 	can I not have been trembling?
can you not have been trembling?
can he not have been trembling?
can we not have been trembling?
can you not have been trembling?
can they not have been trembling?