Question

4．努力學(xué)習(xí)是很重要的．It's very important to study hard．．

Answer 1

分析 It's very important to study hard．

解答 答案：It's very important to study hard．這里是說(shuō)客觀事實(shí)用一般現(xiàn)在時(shí)，表示做某事是怎么樣的，故用It's adj+to do sth．很重要very important，努力學(xué)習(xí)study hard，故答案是It's very important to study hard．

點(diǎn)評(píng) it形式主語(yǔ)，沒(méi)有意思的，動(dòng)詞不定式真正主語(yǔ)．你看，主語(yǔ)那么長(zhǎng)，而謂語(yǔ)就is important 那么短，是不是頭重腳輕，為了句子平衡，使用了形式主語(yǔ)，而把真正主語(yǔ)放在后面，所以句型：it‘s+adj+to do 的意思是：做某事怎么樣．
爾Doctors think it is important to drink enough water every day．
這時(shí)候It is important to drink enough water every day．是賓語(yǔ)從句，作think的賓語(yǔ)．因?yàn)閠hink 可以形成think+賓語(yǔ)+賓語(yǔ)補(bǔ)足語(yǔ)，所以此句可改成Doctors think it important to drink enough water every day．
也就是少了be動(dòng)詞is．此時(shí)，it是形式賓語(yǔ)
important為賓語(yǔ)補(bǔ)足語(yǔ)to drink enough water every day為真正賓語(yǔ)．
能這樣用的，除了find外，常見(jiàn)的還有：find，believe等