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to know when the train 。 注意: ① 有些特殊疑問(wèn)句本身是陳述句語(yǔ)序 。 如: What39。s wrong with? ? Which is the way to? ? What happened to you? ? What39。s the matter/trouble? ? Who studies the hardest in your class? ② do you think后接賓語(yǔ)從句時(shí) , 特殊疑問(wèn)詞即引導(dǎo)詞要前置 , do you think作為插入語(yǔ) 。 如: Who do you think he is talking with? 你認(rèn)為他正在和誰(shuí)交談 ? ? 由 do, does, did構(gòu)成的疑問(wèn)句 , 在轉(zhuǎn)換成賓語(yǔ)從句時(shí) , 要去掉 do,does, did, 且從句中的謂語(yǔ)動(dòng)詞要根據(jù)主句時(shí)態(tài)作出相應(yīng)的變化 。 如: “ Does he sing well? ” The music teacher asked him. → The music teacher asked him if(whether)he sang 知道他唱得是否很好 。 ? 如果是 will, be, have, can組成的疑問(wèn)句 , 在變?yōu)橘e語(yǔ)從句時(shí) , 要把這些詞還原到句中原來(lái)的謂語(yǔ)位置上 , 并根據(jù)主句的時(shí)態(tài)作相應(yīng)的變化 。 如: “ Will you be free tomorrow? ” She asked me. → She asked me if(whether) I would be free 空閑的 。 【 例 5】 —Hi, is a letter for you. — wonder ________. A. who the letter was from B. who was from the letter C. who was the letter from D. who from the letter was 解析: 賓語(yǔ)從句應(yīng)用陳述語(yǔ)序 , 即 be動(dòng)詞 、 助動(dòng)詞和情態(tài)動(dòng)詞都應(yīng)放在主語(yǔ)后 , 在此賓語(yǔ)從句中 , 主語(yǔ)是 the letter, 謂語(yǔ) was from應(yīng)放在主語(yǔ)后 , 故排除選項(xiàng) B和 C;選項(xiàng) D將 from置于主語(yǔ)前 , 是錯(cuò)誤的 。 句意