动名词作主语、宾语
doing 起名词作用，可作主语或宾语，介词后面必须用动名词。
enjoy doing；be good at doing
要点
- 作主语时谓语动词用单数。
- 作宾语接在 enjoy、finish、mind、practise、keep、suggest 等动词后面。
- 介词后面一律用 doing：be good at doing、without doing。
- 动名词的否定形式是 not doing。
- 动名词也能带自己的主语，正式书写用所有格：Would you mind my opening the window?（我的开启动作）—— 口语常见 me opening，写作按 my 走。
- doing 自己还能变被动与变完成：He complained about being kept waiting. ／ She was proud of having finished the race. —— 介词后面照样是 -ing，只是 -ing 里面又套了一层。
- 一批固定说法只收 doing：It is no use crying over spilt milk. ／ There is no point in rushing. ／ There is no telling what will happen.（无法预料）
例句
I enjoy watching the news.
我喜欢看新闻。
We enjoy studying together.
我们一起学习很开心。
I enjoy playing video games.
我喜欢玩电子游戏。
Getting enough sleep is crucial.
获得足够的睡眠至关重要。
Would you mind my opening the window?
我要开一下窗户，你介意吗？
He complained about being kept waiting.
他抱怨让人等了那么久。
易错提示
- 介词后面的动词一定是 doing，这是最容易丢分的地方。
- 动名词作主语表习惯性、抽象的事；不定式作主语表具体某一次。
- 动名词做主语时，前面的"谁在做"要走所有格：His being late made us angry. —— 口语里也听得到 him being late，书面按所有格；而"主格 + 分词"那一格（He being late, we started without him.）是拿来做状语的独立主格，不能拿来当主语用。
- with / without 后面的 doing 也能带被动：He worked without being told. —— 判要不要 being + 过去分词，只看那件事是不是别人对他做。