分析 It's ture that some advertisements may be quite useful.
解答 答案:It's ture that some advertisements may be quite useful.這里是說客觀事實用一般現(xiàn)在時,表示某事是真的,我們用it作為形式主語,that從句做真正主語,構(gòu)成It's ture that,從句主語some advertisements 一些廣告,可能may be,形容詞useful有用的,用副詞quite"相當(dāng)"來修飾useful,故答案是It's ture that some advertisements may be quite useful.
點評 it作為形式主語,從句做真正主語的有1.It+be+形容詞+主語從句,如:
It is uncertain whether he can come to Jenny's birthday party or not.
2.It+be+名詞詞組+主語從句,這類名詞有:a fact,a pity,a shame,an honour,a question等,如:
It's a pity that you missed the exciting football match.It remains a question whether he will come or not.
3.It+be+過去分詞+主語從句,這類過去分詞有:announced,believed,expected,hoped,decided,reported,said,shown等,如:
It is reported that 16 people were killed in the earthquake.
It is not decided who will give the operation to the patient.
4.It+不及物動詞(seem,appear,happen等)+主語從句,這類不及物動詞有:appear,happen,seem等,如:
It seemed that he didn't tell the truth
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