can lower
Verbo regular: lower - lowered- lowered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can lower
you can lower
he can lower
we can lower
you can lower
they can lower 	I can be lowering
you can be lowering
he can be lowering
we can be lowering
you can be lowering
they can be lowering	I can have lowered
you can have lowered
he can have lowered
we can have lowered
you can have lowered
they can have lowered	I can have been lowering
you can have been lowering
he can have been lowering
we can have been lowering
you can have been lowering
they can have been lowering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot lower
you cannot lower
he cannot lower
we cannot lower
you cannot lower
they cannot lower 	I cannot be lowering
you cannot be lowering
he cannot be lowering
we cannot be lowering
you cannot be lowering
they cannot be lowering	I cannot have lowered
you cannot have lowered
he cannot have lowered
we cannot have lowered
you cannot have lowered
they cannot have lowered	I cannot have been lowering
you cannot have been lowering
he cannot have been lowering
we cannot have been lowering
you cannot have been lowering
they cannot have been lowering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I lower?
can you lower?
can he lower?
can we lower?
can you lower?
can they lower? 	can I be lowering?
can you be lowering?
can he be lowering?
can we be lowering?
can you be lowering?
can they be lowering? 	can I have lowered?
can you have lowered?
can he have lowered?
can we have lowered?
can you have lowered?
can they have lowered? 	can I have been lowering?
can you have been lowering?
can he have been lowering?
can we have been lowering?
can you have been lowering?
can they have been lowering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not lower?
can you not lower?
can he not lower?
can we not lower?
can you not lower?
can they not lower? 	can I not be lowering?
can you not be lowering?
can he not be lowering?
can we not be lowering?
can you not be lowering?
can they not be lowering? 	can I not have lowered?
can you not have lowered?
can he not have lowered?
can we not have lowered?
can you not have lowered?
can they not have lowered? 	can I not have been lowering?
can you not have been lowering?
can he not have been lowering?
can we not have been lowering?
can you not have been lowering?
can they not have been lowering?