can tumble
Verbo regular: tumble - tumbled- tumbled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can tumble
you can tumble
he can tumble
we can tumble
you can tumble
they can tumble 	I can be tumbling
you can be tumbling
he can be tumbling
we can be tumbling
you can be tumbling
they can be tumbling	I can have tumbled
you can have tumbled
he can have tumbled
we can have tumbled
you can have tumbled
they can have tumbled	I can have been tumbling
you can have been tumbling
he can have been tumbling
we can have been tumbling
you can have been tumbling
they can have been tumbling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot tumble
you cannot tumble
he cannot tumble
we cannot tumble
you cannot tumble
they cannot tumble 	I cannot be tumbling
you cannot be tumbling
he cannot be tumbling
we cannot be tumbling
you cannot be tumbling
they cannot be tumbling	I cannot have tumbled
you cannot have tumbled
he cannot have tumbled
we cannot have tumbled
you cannot have tumbled
they cannot have tumbled	I cannot have been tumbling
you cannot have been tumbling
he cannot have been tumbling
we cannot have been tumbling
you cannot have been tumbling
they cannot have been tumbling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I tumble?
can you tumble?
can he tumble?
can we tumble?
can you tumble?
can they tumble? 	can I be tumbling?
can you be tumbling?
can he be tumbling?
can we be tumbling?
can you be tumbling?
can they be tumbling? 	can I have tumbled?
can you have tumbled?
can he have tumbled?
can we have tumbled?
can you have tumbled?
can they have tumbled? 	can I have been tumbling?
can you have been tumbling?
can he have been tumbling?
can we have been tumbling?
can you have been tumbling?
can they have been tumbling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not tumble?
can you not tumble?
can he not tumble?
can we not tumble?
can you not tumble?
can they not tumble? 	can I not be tumbling?
can you not be tumbling?
can he not be tumbling?
can we not be tumbling?
can you not be tumbling?
can they not be tumbling? 	can I not have tumbled?
can you not have tumbled?
can he not have tumbled?
can we not have tumbled?
can you not have tumbled?
can they not have tumbled? 	can I not have been tumbling?
can you not have been tumbling?
can he not have been tumbling?
can we not have been tumbling?
can you not have been tumbling?
can they not have been tumbling?