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6．强调句的否定转移：有些否定句在变成强调句时，要把否定转移到被强调的词语之前。尤其是“not…until…”句式的强调要特别注意。 He didn't realize his mistake until the teacher had told him. 变为： It wasn't until the teacher had told him that he realized his mistake. 直到老师告诉他他才意识到自己的错误。 1．如果原句中谓语动词使用的是现在范畴的时态用It is…that。如果原句中谓语动词为过去范畴的时态则用It was…that。有时be前可以使用表示推测的情态动词构成。 It is not everyone that can draw well. 不是每个人都能画得好的。 It was for his eyes that we asked him not to read in the sun. 我们是为他的眼睛着想才叫他不要在太阳下看书的。It must be Jack who let out the secret. 肯定是杰克泄露了秘密。 2．强调主语用人称代词主格，强调宾语用宾格。 It was I who gave you the book.(不用me) It was him that they telephoned.(强调宾语用宾格) 3．即使被强调成分是句子中的时间状语、地点状语、原因状语等，也不能用when，where, because要用that。 It was in Athens that the 2004 Olympic Games were held. 2004年奥运会是在雅典举行的。 4．如果被强调的成分有同位语，同位语也应提前。 It was from him, our English teacher, that we learned this English song. 我们从英语老师那学会了这首英文歌。 5．当被强调的是not…until…句型时，应将not置于until之前，主句由否定句改为肯定句。 We didn't recognize her until she took off her glasses. ⇒It was not until she took off her glasses that we recognized her. | 
