English verb conjugation
CAN UPSHIFT

Regular verb: upshift - upshifted - upshifted

Affirmation

Simple form	V-ing form
I can upshift you can upshift she can upshift we can upshift you can upshift they can upshift	I can be upshifting you can be upshifting she can be upshifting we can be upshifting you can be upshifting they can be upshifting
Perfect	V-ing perfect
I can have upshifted you can have upshifted she can have upshifted we can have upshifted you can have upshifted they can have upshifted	I can have been upshifting you can have been upshifting she can have been upshifting we can have been upshifting you can have been upshifting they can have been upshifting

Negation

Simple form	V-ing form
I can't upshift you can't upshift she can't upshift we can't upshift you can't upshift they can't upshift	I can't be upshifting you can't be upshifting she can't be upshifting we can't be upshifting you can't be upshifting they can't be upshifting
Perfect	V-ing perfect
I can't have upshifted you can't have upshifted she can't have upshifted we can't have upshifted you can't have upshifted they can't have upshifted	I can't have been upshifting you can't have been upshifting she can't have been upshifting we can't have been upshifting you can't have been upshifting they can't have been upshifting

Interrogative form

Simple form	V-ing form
can I upshift? can you upshift? can she upshift? can we upshift? can you upshift? can they upshift?	can I be upshifting? can you be upshifting? can she be upshifting? can we be upshifting? can you be upshifting? can they be upshifting?
Perfect	V-ing perfect
can I have upshifted? can you have upshifted? can she have upshifted? can we have upshifted? can you have upshifted? can they have upshifted?	can I have been upshifting? can you have been upshifting? can she have been upshifting? can we have been upshifting? can you have been upshifting? can they have been upshifting?

Interro-negative form

Simple form	V-ing form
can't I upshift? can't you upshift? can't she upshift? can't we upshift? can't you upshift? can't they upshift?	can't I be upshifting? can't you be upshifting? can't she be upshifting? can't we be upshifting? can't you be upshifting? can't they be upshifting?
Perfect	V-ing perfect
can't I have upshifted? can't you have upshifted? can't she have upshifted? can't we have upshifted? can't you have upshifted? can't they have upshifted?	can't I have been upshifting? can't you have been upshifting? can't she have been upshifting? can't we have been upshifting? can't you have been upshifting? can't they have been upshifting?