北師大版英語八年級上冊Unit4 名師指導(dǎo)：狀語從句知多少

1、教育精選名師指導(dǎo)：狀語從句知多少狀語從句，指的是在復(fù)合句中作狀語的從句，修飾主句中的動詞、形容詞或副詞等。狀語從句放在主句之前時，常用逗號分開；若放在主句之后，一般不用逗號。按其意義和作用劃分，可以分為以下幾種： 時間狀語從句一般來說，時間狀語從句常由連詞when, before, after, as soon as或until引導(dǎo)。在使用時，從句一般不用一般將來時態(tài)。若主句為一般將來時態(tài)或是含有將來的意味時，時間狀語從句常用一般現(xiàn)在時態(tài)來代替將來，即“主將從現(xiàn)”。例如：I will tell him the news as soon as he comes back. 他一回來，我就告訴他這

2、個消息。When I grow up, I will join the army. 當(dāng)我畢業(yè)了，我就要去參軍。 條件狀語從句條件狀語從句常由if（如果）或as long as（只要）來引導(dǎo)，同樣適用于“主將從現(xiàn)”。例如：We will stay at home if it rains tomorrow. 如果明天下雨了，我們就會呆在家。As long as I live, I shall work hard. 只要我活著，我就要努力工作。 原因狀語從句原因狀語從句常由because（因?yàn)椋?，since（既然；由于）或as（由于）來引導(dǎo)。在使用時，注意because和so（所以）不能用在同一個句

3、子中。例如：Since you cant help me, Ill find someone else. 既然你幫不了我，那我就找其他人吧。I was late for school this morning because the traffic was busy.= The traffic was busy, so I was late for school this morning.因?yàn)樵绯拷煌ǘ氯?，所以我遲到了。 目的狀語從句目的狀語從句由so that（為了，以便）或in order that（為了）來引導(dǎo)，使用時，常放在主句之后，且從句中常用can, could, may, mig

4、ht等情態(tài)動詞。例如：The teacher spoke in a loud voice so that / in order that we could hear him clearly.老師用很大的聲音以便于我們能聽清他講課。 結(jié)果狀語從句結(jié)果狀語從句常由so.that.（如此.以至于）來引導(dǎo)，在使用時要注意so的后邊接的是形容詞或副詞的原級。例如：His pants are so dirty that he must wash them. 他的衣服如此臟以至于他必須去洗一洗了。 讓步狀語從句讓步狀語從句由although或though（雖然；盡管）來引導(dǎo)。注意，在使用時，though或a

5、lthough不能和but不能用在同一個句子中，兩者只能用其一。例如：We still went to school although / though it was raining hard.= It was raining hard, but we still went to school.盡管天下著大雨，但是我們?nèi)匀蝗ド蠈W(xué)了。 比較狀語從句比較狀語從句由than（比），as.as.（和.一樣）或not as / so.as.（和.不一樣）來引導(dǎo)。than用在比較級中，而as.as.中間用形容詞或副詞的原級。 例如：My dictionary is much thicker than yo

6、urs. 我的詞比你的厚的多。Your sweater isnt as / so new as mine. 你的毛衣沒有我的新。好了，說了這么多，你都學(xué)會了嗎？那么，來練一練吧！ 練一練：單項(xiàng)選擇（ ）1. - What a hard life my parents live!- So do my parents. When I grow up, I _ to make them live more happily.Atry Btried Cwill try Dhave tried （ ）2. If he _ on time, we will go without him. A. d

7、oesnt come B. dont come C. didnt come （ ）3. Dont just believe the advertisement. That kind of camera is _it says. A. as good as B. not as good asC. as well as D. not as well as （ ）4. -More and more people in Beijing are learning English_ they can better serve the 2008 Olympic Games. -Im sure they will. A. because of B. so that C. even though D. as if（ ）5. She still failed in the exam, _ she tried her best.A. though B. because C. if （ ）6. The