English verb conjugation
CAN MOTHBALL

Regular verb: mothball - mothballed - mothballed

Affirmation

Simple form	V-ing form
I can mothball you can mothball she can mothball we can mothball you can mothball they can mothball	I can be mothballing you can be mothballing she can be mothballing we can be mothballing you can be mothballing they can be mothballing
Perfect	V-ing perfect
I can have mothballed you can have mothballed she can have mothballed we can have mothballed you can have mothballed they can have mothballed	I can have been mothballing you can have been mothballing she can have been mothballing we can have been mothballing you can have been mothballing they can have been mothballing

Negation

Simple form	V-ing form
I can't mothball you can't mothball she can't mothball we can't mothball you can't mothball they can't mothball	I can't be mothballing you can't be mothballing she can't be mothballing we can't be mothballing you can't be mothballing they can't be mothballing
Perfect	V-ing perfect
I can't have mothballed you can't have mothballed she can't have mothballed we can't have mothballed you can't have mothballed they can't have mothballed	I can't have been mothballing you can't have been mothballing she can't have been mothballing we can't have been mothballing you can't have been mothballing they can't have been mothballing

Interrogative form

Simple form	V-ing form
can I mothball? can you mothball? can she mothball? can we mothball? can you mothball? can they mothball?	can I be mothballing? can you be mothballing? can she be mothballing? can we be mothballing? can you be mothballing? can they be mothballing?
Perfect	V-ing perfect
can I have mothballed? can you have mothballed? can she have mothballed? can we have mothballed? can you have mothballed? can they have mothballed?	can I have been mothballing? can you have been mothballing? can she have been mothballing? can we have been mothballing? can you have been mothballing? can they have been mothballing?

Interro-negative form

Simple form	V-ing form
can't I mothball? can't you mothball? can't she mothball? can't we mothball? can't you mothball? can't they mothball?	can't I be mothballing? can't you be mothballing? can't she be mothballing? can't we be mothballing? can't you be mothballing? can't they be mothballing?
Perfect	V-ing perfect
can't I have mothballed? can't you have mothballed? can't she have mothballed? can't we have mothballed? can't you have mothballed? can't they have mothballed?	can't I have been mothballing? can't you have been mothballing? can't she have been mothballing? can't we have been mothballing? can't you have been mothballing? can't they have been mothballing?