turn into 用在名词前面。
He's a lovely man, but when he gets jealous he turns into a monster.
他是个讨人喜欢的人，但是他一旦妒忌起来，就成了一个恶煞。
A girl has to kiss a lot of frogs before one of them turns into a prince.
一个女孩子要亲吻很多青蛙，才会遇到一只变成王子。
turn to 和 turn into 都可用在表示物质的名词之前。
Everything that King Midas touched turn (in)to gold.
弥达斯国王触碰到的所有东西都变成了金子。
They stood there as if they had been turned (in)to stone.
他们一动不动地站在那儿，好像已经变成石头人了。
(以上摘自《牛津英语用法指南》第四版394.7)
（待续）
