English verb conjugation
CAN LOWER

Regular verb: lower - lowered - lowered

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
I can't lower you can't lower he can't lower we can't lower you can't lower they can't lower	I can't be lowering you can't be lowering he can't be lowering we can't be lowering you can't be lowering they can't be lowering
Perfect	V-ing perfect
I can't have lowered you can't have lowered he can't have lowered we can't have lowered you can't have lowered they can't have lowered	I can't have been lowering you can't have been lowering he can't have been lowering we can't have been lowering you can't have been lowering they can't have been lowering

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
can't I lower? can't you lower? can't he lower? can't we lower? can't you lower? can't they lower?	can't I be lowering? can't you be lowering? can't he be lowering? can't we be lowering? can't you be lowering? can't they be lowering?
Perfect	V-ing perfect
can't I have lowered? can't you have lowered? can't he have lowered? can't we have lowered? can't you have lowered? can't they have lowered?	can't I have been lowering? can't you have been lowering? can't he have been lowering? can't we have been lowering? can't you have been lowering? can't they have been lowering?