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．這里是說客觀事實用一般現(xiàn)在時，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．

點評 it形式主語，沒有意思的，動詞不定式真正主語．你看，主語那么長，而謂語就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，而把真正主語放在后面，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．
這時候It is important to drink enough water every day．是賓語從句，作think的賓語．因為think 可以形成think+賓語+賓語補足語，所以此句可改成Doctors think it important to drink enough water every day．
也就是少了be動詞is．此時，it是形式賓語
important為賓語補足語to drink enough water every day為真正賓語．
能這樣用的，除了find外，常見的還有：find，believe等