take a turn for the worse

• vi. 变坏，（病情）恶化，急转直下

take a turn for the worse的用法和样例：

例句

用作不及物动词 (vi.)

1. I think our fortune is on the turn.
   我想我们的时运将要好转。
2. We all hope for an improvement in the weather.
   我们都希望天气好转。