5. My mother wants me to drink it.我妈妈想要我喝。

want to do sth. 想要做某事

want sb. to do sth. 想要某人干某事

Do you want to go to the movies with me?

你想和我一起去看电影吗?

I want you to help me with my math.

我想要你帮我学数学。

有很多动词后面用这种结构做动词的复合宾语：

ask sb. to do sth. 叫某人做某事

tell sb. to do sth. 告诉某人去做某事

help sb. (to) do sth. 帮助某人做某事

6. She says it's good for my health.她说它对我的健康有意。

be good for … 表示“对……有益(有好处)”

其反义为：be bad for … 对……有害/无益

It's good for us to do more reading.

多读书对我们有好处。

Drinking milk is good for your health.

喝牛奶对你的健康有益。

Reading English is good for studying English.

对英语对学习英语有益/有帮助。

Reading in bed is bad for your eyes.

在床上读书对你的眼睛有害。