English verb conjugation
CAN SHIFT

Regular verb: shift - shifted - shifted

Affirmation

Simple form	V-ing form
I can shift you can shift she can shift we can shift you can shift they can shift	I can be shifting you can be shifting she can be shifting we can be shifting you can be shifting they can be shifting
Perfect	V-ing perfect
I can have shifted you can have shifted she can have shifted we can have shifted you can have shifted they can have shifted	I can have been shifting you can have been shifting she can have been shifting we can have been shifting you can have been shifting they can have been shifting

Negation

Simple form	V-ing form
I cannot shift you cannot shift she cannot shift we cannot shift you cannot shift they cannot shift	I cannot be shifting you cannot be shifting she cannot be shifting we cannot be shifting you cannot be shifting they cannot be shifting
Perfect	V-ing perfect
I cannot have shifted you cannot have shifted she cannot have shifted we cannot have shifted you cannot have shifted they cannot have shifted	I cannot have been shifting you cannot have been shifting she cannot have been shifting we cannot have been shifting you cannot have been shifting they cannot have been shifting

Interrogative form

Simple form	V-ing form
can I shift? can you shift? can she shift? can we shift? can you shift? can they shift?	can I be shifting? can you be shifting? can she be shifting? can we be shifting? can you be shifting? can they be shifting?
Perfect	V-ing perfect
can I have shifted? can you have shifted? can she have shifted? can we have shifted? can you have shifted? can they have shifted?	can I have been shifting? can you have been shifting? can she have been shifting? can we have been shifting? can you have been shifting? can they have been shifting?

Interro-negative form

Simple form	V-ing form
can I not shift? can you not shift? can she not shift? can we not shift? can you not shift? can they not shift?	can I not be shifting? can you not be shifting? can she not be shifting? can we not be shifting? can you not be shifting? can they not be shifting?
Perfect	V-ing perfect
can I not have shifted? can you not have shifted? can she not have shifted? can we not have shifted? can you not have shifted? can they not have shifted?	can I not have been shifting? can you not have been shifting? can she not have been shifting? can we not have been shifting? can you not have been shifting? can they not have been shifting?