turn into

turn into
turn (somebody/something) into something phrasal verb (see also turn)
1. to become something different, or to make someone or something do this:
    The sofa turns into a bed.
    A few weeks later, winter had turned into spring.
    Hollywood discovered her and turned her into a star.
2. to change by magic from one thing into another, or to make something do this:
    In a flash, the prince turned into a frog.
    The witch had turned them all into stone.
3. days turned into weeks/months turned into years etc used to say that time passed slowly while you waited for something to happen:
    Weeks turned into months, and still there was no letter.