English verb conjugation
CAN LOWER

Regular verb: lower - lowered - lowered

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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