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 cannot upshift you cannot upshift she cannot upshift we cannot upshift you cannot upshift they cannot upshift	I cannot be upshifting you cannot be upshifting she cannot be upshifting we cannot be upshifting you cannot be upshifting they cannot be upshifting
Perfect	V-ing perfect
I cannot have upshifted you cannot have upshifted she cannot have upshifted we cannot have upshifted you cannot have upshifted they cannot have upshifted	I cannot have been upshifting you cannot have been upshifting she cannot have been upshifting we cannot have been upshifting you cannot have been upshifting they cannot 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 I not upshift? can you not upshift? can she not upshift? can we not upshift? can you not upshift? can they not upshift?	can I not be upshifting? can you not be upshifting? can she not be upshifting? can we not be upshifting? can you not be upshifting? can they not be upshifting?
Perfect	V-ing perfect
can I not have upshifted? can you not have upshifted? can she not have upshifted? can we not have upshifted? can you not have upshifted? can they not have upshifted?	can I not have been upshifting? can you not have been upshifting? can she not have been upshifting? can we not have been upshifting? can you not have been upshifting? can they not have been upshifting?