不定式和動(dòng)名詞作主語(yǔ)的區(qū)別：
(1)動(dòng)名詞作主語(yǔ)通常表示抽象動(dòng)作；而不定式作主語(yǔ)表示具體動(dòng)作.
Smoking is prohibited(禁止)here．這里禁止抽煙.(抽象)
It is not very good for you to smoke so much．你抽這么多煙對(duì)你身體很不好.(具體)
(2)動(dòng)名詞作主語(yǔ)時(shí),通常用以表示一件已知的事或經(jīng)驗(yàn).
不定式短語(yǔ)通常用來(lái)表示一件未完成的事或目的.
Climbing mountains is interesting．爬山很有趣.(經(jīng)驗(yàn))
Driving a car during the rush hour is tiring．在高峰時(shí)刻開(kāi)車(chē)令人厭煩.(經(jīng)驗(yàn))
(3）不定式做主語(yǔ),一般用it當(dāng)形式主語(yǔ),把作主語(yǔ)的不定式短語(yǔ)后置.
It took me only five minutes to finish the job.