UNIT 6 I like music that I can dance to.教學(xué)案
關(guān)系詞的選擇依據(jù)在從句中所做的成分，先行詞在從句中做主、定、賓語時(shí)，選擇關(guān)系代詞（who, whom, that, which, whose）； 先行詞在從句中做狀語時(shí)，應(yīng)選擇關(guān)系副詞 （ where 地點(diǎn)狀語，when 時(shí)間狀語，why 原因狀語） 。 4. 限制性和非限制性定語從句 1） 定語從句有限制性和非限制性兩種。限制性定語從句是先行詞不可缺少的部分，去掉它主句意思往往不明確；非限制性定語從句是先行詞的附加說明，去掉了也不會(huì)影響主句的意思，它與主句之間通常用逗號分開。例如： this is the house which we bought last month. 這是我們上個(gè)月買的那幢房子。（限制性） the house, which we bought last month, is very nice.這幢房子很漂亮，是我們上個(gè)月買的。（非限制性）2） 當(dāng)先行詞是專有名詞或物主代詞和指示代詞所修飾時(shí)，其后的定語從句通常是非限制性的。例如： charles smith, who was my former teacher, retired last year. 查理·史密斯去年退休了，他曾經(jīng)是我的老師�！ y house, which i bought last year, has got a lovely garden. 我去年買的的那幢房子帶著個(gè)漂亮的花園。 this novel, which i have read three times, is very touching. 這本小說很動(dòng)人，我已經(jīng)讀了三遍。3） 非限制性定語從句還能將整個(gè)主句作為先行詞, 對其進(jìn)行修飾, 這時(shí)從句謂語動(dòng)詞要用第三人稱單數(shù)。例如： he seems not to have grasped what i meant, which greatly upsets me. 他似乎沒抓住我的意思，這使我心煩�！ iquid water changes to vapor, which is called evaporation. 液態(tài)水變?yōu)檎羝�，這就叫做蒸發(fā)。說明：關(guān)系代詞that和關(guān)系副詞why不能引導(dǎo)非限制性定語從句。 5. 介詞+關(guān)系詞 1）介詞后面的關(guān)系詞不能省略。2）that前不能有介詞。3）某些在從句中充當(dāng)時(shí)間，地點(diǎn)或原因狀語的"介詞+關(guān)系詞"結(jié)構(gòu)可以同關(guān)系副詞when 和where 互換。例如： this is the house in which i lived two years ago. 這是我兩年前住過的房子�！� this is the house where i lived two years ago. do you remember the day on which you joined our club? 還記得你加入我們俱樂部的那一天嗎？ do you remember the day when you joined our club? 6. as, which 非限定性定語從句 由as, which 引導(dǎo)的非限定性定語從句，as和which可代整個(gè)主句，相當(dāng)于and this或and that。as一般放在句首，which在句中。例如： as we know, smoking is harmful to one's health. 如我們所知，吸煙有害健康。the sun heats the earth, which is very important to us. 太陽使地球暖起來，這對我們?nèi)祟惡苤匾�。典型例題 1）alice received an invitation from her boss, ___came as a surprise.a. it b. that c. which d. he 答案c. 此為非限定性從句，不能用 that修飾，而用which.，it 和he 都使后句成為句子，兩個(gè)獨(dú)立的句子不能單以逗號連接。況且選he句意不通。2）the weather turned out to be very good, ___ was more than we could expect.