should lower
Regular verb: lower - lowered- lowered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should lower
you should lower
she should lower
we should lower
you should lower
they should lower 	I should be lowering
you should be lowering
she should be lowering
we should be lowering
you should be lowering
they should be lowering	I should have lowered
you should have lowered
she should have lowered
we should have lowered
you should have lowered
they should have lowered	I should have been lowering
you should have been lowering
she should have been lowering
we should have been lowering
you should have been lowering
they should have been lowering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not lower
you should not lower
she should not lower
we should not lower
you should not lower
they should not lower 	I should not be lowering
you should not be lowering
she should not be lowering
we should not be lowering
you should not be lowering
they should not be lowering	I should not have lowered
you should not have lowered
she should not have lowered
we should not have lowered
you should not have lowered
they should not have lowered	I should not have been lowering
you should not have been lowering
she should not have been lowering
we should not have been lowering
you should not have been lowering
they should not have been lowering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I lower?
should you lower?
should she lower?
should we lower?
should you lower?
should they lower? 	should I be lowering?
should you be lowering?
should she be lowering?
should we be lowering?
should you be lowering?
should they be lowering? 	should I have lowered?
should you have lowered?
should she have lowered?
should we have lowered?
should you have lowered?
should they have lowered? 	should I have been lowering?
should you have been lowering?
should she have been lowering?
should we have been lowering?
should you have been lowering?
should they have been lowering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not lower?
should you not lower?
should she not lower?
should we not lower?
should you not lower?
should they not lower? 	should I not be lowering?
should you not be lowering?
should she not be lowering?
should we not be lowering?
should you not be lowering?
should they not be lowering? 	should I not have lowered?
should you not have lowered?
should she not have lowered?
should we not have lowered?
should you not have lowered?
should they not have lowered? 	should I not have been lowering?
should you not have been lowering?
should she not have been lowering?
should we not have been lowering?
should you not have been lowering?
should they not have been lowering?