你的知識點掌握的很好,但你理解錯了他問的是since when 而不是since it has been like this將這個一般疑問句轉(zhuǎn)化成陳述句就是since I dropped fom the bed yesterday（用這個答案代替when） it has been like this有...請問原句是不是等于I wonder it has been like this since when?而since后所加的時間點因為是詢問，所以用when代替？句子結(jié)構(gòu)為：主語I謂語wonder賓語也就是it has been like this since when而since when只是做賓語從句中的狀語?？墒沁@樣分析的話，卻發(fā)現(xiàn)賓語缺個引導(dǎo)詞。。請問下我又哪錯了。。你的分析是對的但這個賓語從句的引導(dǎo)詞可以省略感謝