動名詞
動名詞是動詞的一種非謂語形式，由動詞原形加-ing構(gòu)成，它在句中起名詞的作用，可以在句子中用作主語、表語、賓語、賓語補語、狀語和定語。
1、 動名詞作主語
Walking is good exercise. 走路是很好的運動
Seeing is believing. 眼見為實。
Smoking may cause cancer. 吸煙可能導(dǎo)致癌癥。
Coming to Hangzhou by train takes about 16 hours. 乘火車到杭州要16個小時。
Swimming develops the muscles. 游泳可以發(fā)展肌肉。
通常為了避免句子主語過于冗長，用it作形式主語。如：
It's nice talking with you.
和你談話很高興。
It's no use arguing with him.
跟他爭論沒用。
It is no use sending him over. It’s too late already. 派他去沒用，已經(jīng)太晚了。
It was very difficult getting everything ready in time. 要把一切按時準備好很困難。
“There + be + no + -ing”結(jié)構(gòu)，如：
There is no joking about such matters. 這種事開不得玩笑。
There is no harm in doing so. 這樣做沒有害處。
There is no denying the fact that the new method has greatly raised labour productivity.
不容否認新方法大大提高了勞動生產(chǎn)率。
