to have changed
Então não deve ter mudado muito.
So it shouldn't have changed much.
— Rebecca, A Mulher Inesquecível (1940)
Tom deve ter mudado isso.
Tom must have changed that.
Tom não parece ter mudado.
Tom doesn't seem to have changed.
I wish I could have changed that.
Tom me agradeceu por ter mudado a sua vida.
Tom thanked me for changing his life.