【正文】 做個記號。 ? You39。d better make a mark where you have any questions. (這里where引導的從句不是定語從句) 注意：在地點狀語從句之前，不要使用介詞。【誤】You should put the book at where it was.【正】You should put the book where it was.你應該把書放在原來的地方?！菊`】We should go to where we are needed most.【正】We should go where we are needed most.我們應該到最需要我們的地方去。B. wherever在任何……地方，無論哪里 ? 不論到什么地方，都要把工作做好。 ? Wherever you go, you should do your work well. ? 你愛坐哪兒就坐哪兒。 ? You may sit down wherever you like. C. Everywhere 他們每到一處都受到了友好的接待。Everywhere they went, they were kindly received.? 考點梳理 9. 原因狀語從句 考點：原因狀語從句用法 考查方式：簡單因果邏輯關(guān)系和引導詞之間的關(guān)系。 ? 原因狀語從句引導詞 A. because/ for B. since C. as D. Now that A. because 和for的區(qū)別1．for 是并列連詞，只用于連接表示原因的分句，因此不能用于句首。because表示原因時，可位于句首?！菊`】For he did not obey the rules, he was punished.【正】Because he did not obey the rules, he was punished.由于他不遵守規(guī)章制度，他受到了處。2．for 表示的是推斷解釋，because強調(diào)動作發(fā)生的直接原因。It must have rained last night, for the ground is wet.昨晚肯定下雨了，因為地面是濕的。（不可用because，因為地面濕不是天下雨的原因）The day breaks, for the birds are singing.天亮了，因為鳥在叫。（不可用because，因為鳥叫不是天亮的原因）He went to bed early, because he was tired由于他累了，所以他很早就上了床。（直接的理由）He must be tired, for he went to bed early.他肯定累了，因為他很早就上了床。（間接的推斷）3．在強調(diào)結(jié)構(gòu)It is/ was…that和關(guān)聯(lián)詞not…but 引導的原因狀語從句中，宜用because。It39。s because he helped you that I39。m prepared to help him.正是因為他幫助過你，所以我樂意去幫助他。He decided to give up the chance of going abroad, not because he did not wantto but because his wife was ill.他決定放棄出國的機會，不是因為他不想去，而是因為他妻子病了。 B．since since 因為，既然。引導的從句大多置于句首，主從句的時態(tài)一般相同。Since you have no licence, you are not allowed to drive.因為你沒有駕駛執(zhí)照，所以不允許你開車。Since you are al here, let39。s try and reach a decision.既然大家都來了，咱們就設(shè)法做出一個決定吧。C．a(chǎn)sas 由于，一般多用于句首。As she was ill, she didn39。t e to the party.由于病了，她沒來參加晚會。As he was not well enough, I had to go without him.由于他身體欠佳，我只好不帶他去了。As it rained, we all stayed at home.由于下雨我們都呆在家里。because, since, as 的區(qū)別1．because語氣最強，表達的是未知的新信息，一般置于主句之后，也可以放在主句之前，用逗號隔開。在回答why引導的特殊疑問句時，或在 強調(diào)結(jié)構(gòu)It is/was … that 和關(guān)聯(lián)詞not … but 引導的原因狀語從句中，要用because。另外，because還常和副詞just, merely等連用。2．since 往往表示的是已知的客觀事實，或分析后的推理，引導的從句大多置于句首，主從句的時態(tài)一般相同。3．a(chǎn)s 表示的理由最弱，只是對主句的附帶說明，重點在主句。as從句通常放在主句前。Just because he doesn39。t plain, you must not suppose that he is satisfied.你不可只因他不抱怨就以為他滿足了。You shouldn39。t get angry only because some people speak ill of you.你不該僅僅因為有些人說了你的壞話就生氣。Since you39。re not interested, Iwon39。t tell you about it.既然你不感興趣，那我就不告訴你了。As you are unable to answer perhaps we should ask someone else.因為你不能回答，也許我們該問一問別的人。D．now thatnow that 既然，因為。that可以省略。Now (that) dinner is ready, go and wash your hands.既然飯已好了，洗手去吧。Now you mention it again, I do remember.既然你又提起此事，我倒回想起來了。狀語從句的省略 有些時間、地點、條件、方式或讓步等狀語從句中，如果謂語含有動詞be，主語又和主句中的主語一致，或者主語是it，常把從句中的主語和謂語的一部分（特別是動詞be）省略掉。Look out for cars when crossing the stret.過街時當心車輛。(= when you are crossing the street)She hurriedly left the room as though angry.她急匆匆地走出屋去，好象很生氣的樣子。(= as thoughif she was were angry…)If possible, I39。d like to have two copies of it.可能的話，我想要兩本。(= if it is possible,…)She advised me not o say anything unless asked.她勸我別說什么，除非有人要我說。(= unless I was asked )As a young man, he studied law and became a lawyer.他年輕時就學了法律，并當了律師。(= As When he was a young man,…)