can bubble
Verbo regular: bubble - bubbled- bubbled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can bubble
you can bubble
she can bubble
we can bubble
you can bubble
they can bubble 	I can be bubbling
you can be bubbling
she can be bubbling
we can be bubbling
you can be bubbling
they can be bubbling	I can have bubbled
you can have bubbled
she can have bubbled
we can have bubbled
you can have bubbled
they can have bubbled	I can have been bubbling
you can have been bubbling
she can have been bubbling
we can have been bubbling
you can have been bubbling
they can have been bubbling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot bubble
you cannot bubble
she cannot bubble
we cannot bubble
you cannot bubble
they cannot bubble 	I cannot be bubbling
you cannot be bubbling
she cannot be bubbling
we cannot be bubbling
you cannot be bubbling
they cannot be bubbling	I cannot have bubbled
you cannot have bubbled
she cannot have bubbled
we cannot have bubbled
you cannot have bubbled
they cannot have bubbled	I cannot have been bubbling
you cannot have been bubbling
she cannot have been bubbling
we cannot have been bubbling
you cannot have been bubbling
they cannot have been bubbling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I bubble?
can you bubble?
can she bubble?
can we bubble?
can you bubble?
can they bubble? 	can I be bubbling?
can you be bubbling?
can she be bubbling?
can we be bubbling?
can you be bubbling?
can they be bubbling? 	can I have bubbled?
can you have bubbled?
can she have bubbled?
can we have bubbled?
can you have bubbled?
can they have bubbled? 	can I have been bubbling?
can you have been bubbling?
can she have been bubbling?
can we have been bubbling?
can you have been bubbling?
can they have been bubbling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not bubble?
can you not bubble?
can she not bubble?
can we not bubble?
can you not bubble?
can they not bubble? 	can I not be bubbling?
can you not be bubbling?
can she not be bubbling?
can we not be bubbling?
can you not be bubbling?
can they not be bubbling? 	can I not have bubbled?
can you not have bubbled?
can she not have bubbled?
can we not have bubbled?
can you not have bubbled?
can they not have bubbled? 	can I not have been bubbling?
can you not have been bubbling?
can she not have been bubbling?
can we not have been bubbling?
can you not have been bubbling?
can they not have been bubbling?