题目内容
20.He found it quite difficult to learn English well.(变成带宾语从句的复合句)He found(that)it was quite difficult to learn English well..分析 他发现把英语学好是很困难的.
解答 答案:He found(that)it was quite difficult to learn English well.原句是it作为形式宾语,动词不定式做真正宾语.这里换成find后加上宾语从句,that作为引导词,可以省略,用句型it is+adj+to do sth做某事是怎么样的,it是形式主语,动词不定式做真正主语.主句是一般过去时,从句也用一般过去时,it三单,故was,故答案是He found(that)it was quite difficult to learn English well.
点评 当不定式(短语)、动名词(短语)或从句在某个句子中作宾语时,为保持句子结构平衡,避免句式结构的混乱,常用it作形式宾语,而将真正的宾语放在句尾,构成"动词+it+宾语补足语+不定式(动名词或从句)"结构,也可称作"6123结构".此时it仍只起先行引导作用,本身无词义.它可以代替三种形式:不定式、动名词和宾语从句. it作形式宾语时,需具备两个条件:①真正的宾语是不定式、动名词或从句; ②有宾语补足语,具备了这两个条件,形式宾语it一定要用
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