turn 的过去式是turned

例句如下，请仔细体会和理解吧

1.

As soon as he turned his back, she would make her escape.

他一转身，她就逃跑。

2.

They turned and ran when they saw us coming.

他们看见我们过来，转身就跑。

3.

He turned his back to the wall.

他转身背对着墙。

你说turn on打开。过去式turned on。