课本中不会教你的[C]148　cast off，cast away，cast down和cast about/around for

148　cast off，cast away，cast down和cast about/around for

① cast off丢弃；放船，发船。

We cast off and set sail at 8 am. 我们上午8点钟解缆起航。

② cast away

（1）扔掉，丢掉，浪费掉

Don't cast away these old papers. 别把这些旧报纸扔掉。

cast away one's time 浪费时间

（2）（通常用被动式）使（船难中幸存者）漂流到。

The sailors were cast away on a desert island. 因船失事，水手们流落到一个荒岛上。

③ cast down（通常用被动式）气馁，沮丧。

Father was very cast down by the news of our aunt's death. 姑妈去世的消息使父亲很沮丧。

④ cast about/around for（没有被动式）到处寻找，试图（设法）找到。

The prisoner cast about for a way of escape. 犯人试图找到一个逃跑的办法。

John cast around for a good title for his article. 约翰想给他的文章找个好标题。