English verb conjugation
CAN PLUMB

Regular verb: plumb - plumbed - plumbed

Affirmation

Simple form	V-ing form
I can plumb you can plumb she can plumb we can plumb you can plumb they can plumb	I can be plumbing you can be plumbing she can be plumbing we can be plumbing you can be plumbing they can be plumbing
Perfect	V-ing perfect
I can have plumbed you can have plumbed she can have plumbed we can have plumbed you can have plumbed they can have plumbed	I can have been plumbing you can have been plumbing she can have been plumbing we can have been plumbing you can have been plumbing they can have been plumbing

Negation

Simple form	V-ing form
I can't plumb you can't plumb she can't plumb we can't plumb you can't plumb they can't plumb	I can't be plumbing you can't be plumbing she can't be plumbing we can't be plumbing you can't be plumbing they can't be plumbing
Perfect	V-ing perfect
I can't have plumbed you can't have plumbed she can't have plumbed we can't have plumbed you can't have plumbed they can't have plumbed	I can't have been plumbing you can't have been plumbing she can't have been plumbing we can't have been plumbing you can't have been plumbing they can't have been plumbing

Interrogative form

Simple form	V-ing form
can I plumb? can you plumb? can she plumb? can we plumb? can you plumb? can they plumb?	can I be plumbing? can you be plumbing? can she be plumbing? can we be plumbing? can you be plumbing? can they be plumbing?
Perfect	V-ing perfect
can I have plumbed? can you have plumbed? can she have plumbed? can we have plumbed? can you have plumbed? can they have plumbed?	can I have been plumbing? can you have been plumbing? can she have been plumbing? can we have been plumbing? can you have been plumbing? can they have been plumbing?

Interro-negative form

Simple form	V-ing form
can't I plumb? can't you plumb? can't she plumb? can't we plumb? can't you plumb? can't they plumb?	can't I be plumbing? can't you be plumbing? can't she be plumbing? can't we be plumbing? can't you be plumbing? can't they be plumbing?
Perfect	V-ing perfect
can't I have plumbed? can't you have plumbed? can't she have plumbed? can't we have plumbed? can't you have plumbed? can't they have plumbed?	can't I have been plumbing? can't you have been plumbing? can't she have been plumbing? can't we have been plumbing? can't you have been plumbing? can't they have been plumbing?