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        ?

        ?unless、as soon as與so...that...

        2019-04-26 05:13:34北京
        瘋狂英語·新策略 2019年4期
        關(guān)鍵詞:中考題復(fù)合句主句

        北京 楊 嵐

        unless、as soon as和so...that...都是連詞,它們各自都可以用來引導(dǎo)不同的狀語從句。

        ◎用法梳理

        ◆unless從句

        unless意為“除非;如果不”,引導(dǎo)條件狀語從句。unless引導(dǎo)的條件狀語從句表示否定意義,相當(dāng)于if引導(dǎo)的條件狀語從句的否定形式,即“if...not...”。 例如:

        We will go on a picnic this weekend unless it rains.=If it doesn't rain,we will go on a picnic this weekend.如果這個周末不下雨,我們將會去野餐。

        Unless he allows me to leave,I can't leave here.如果他不允許我離開,我不能離開這里。

        ◆as soon as從句

        as soon as意為“一……就……”,用來引導(dǎo)時間狀語從句,表示主句動作緊接著從句動作發(fā)生。例如:

        Mary turned on the TV as soon as she got home.瑪麗一到家就打開了電視。

        They will start as soon as Robert arrives.羅伯特一到他們就動身。

        【知識拓展】

        1.通常情況下,在含有unless或as soon as的復(fù)合句中,如果主句用一般將來時或主句的謂語部分含有情態(tài)動詞,它們引導(dǎo)的從句常用一般現(xiàn)在時。

        2.在復(fù)合句中,unless或as soon as引導(dǎo)的狀語從句可以放在主句之前,也可放在主句之后。當(dāng)從句位于主句之前時,常用逗號將其與主句隔開。

        ◆so...that...從句

        so...that...意為“如此……以至于……”,用來引導(dǎo)結(jié)果狀語從句。常見結(jié)構(gòu)為“so+形容詞/副詞+that從句”和“so+形容詞+a/an+單數(shù)可數(shù)名詞+that從句”。例如:

        He was so excited that he couldn't say a word.他如此興奮以至于一句話也說不出來了。

        Helensangsowell that everybody cheered her.海倫唱得如此好,以至于每個人都為她喝彩。

        It is so interesting a book that I want to read it again.這本書如此有趣,以至于我還想再讀一遍。

        【知識拓展】

        1.so...that...有時可與too...to...和...enough to...結(jié)構(gòu)進行轉(zhuǎn)換,通常分為下面兩種情況:

        (1)如果that引導(dǎo)的從句是否定句,且主句和從句的主語相同,那么so...that...可轉(zhuǎn)換為too...to...結(jié)構(gòu);如果從句和主句的主語不同,so...that...則可轉(zhuǎn)換為too...for sb.to...結(jié)構(gòu)。例如:

        He is so young that he can't do it.→

        He is too young to do it.

        Tom spoke so fast that we could hardly follow him.→

        Tom spoke too fast for us to follow.

        (2)如果that引導(dǎo)的從句是肯定句,且主句和從句的主語相同,那么so...that...可轉(zhuǎn)換為...enough to...結(jié)構(gòu);如果從句和主句的主語不同,so...that...則可轉(zhuǎn)換為...enough for sb.to...結(jié)構(gòu)。例如:

        Her brother is so strong that he can move the heavy box.→

        Her brother is strong enough to move the heavy box.

        The problem is so easy that all the students can work it out.→

        The problem is easy enough for all the students to work it out.

        2.such...that...也意為“如此……以至于……”,用來引導(dǎo)結(jié)果狀語從句。常用結(jié)構(gòu)有 “such+a/an+形容詞+單數(shù)可數(shù)名詞+that從句”和“such+形容詞+復(fù)數(shù)可數(shù)名詞/不可數(shù)名詞+that從句”。例如:

        It is such an interesting movie that I have seen it three times.這部電影如此有趣,以至于我看了三遍。

        It was such fine weather yesterday that we went boating.昨天天氣很好,我們便去劃船了。

        【溫馨提示】當(dāng)名詞前的形容詞是many、much、few、little時,such要改為so, 即 “so+many/much/few/little+名詞+that從句”。例如:

        There was so much work to do that everybody got bored.有這么多的工作要做,人人都感到厭煩了。

        3.so that意為“以便……;為了……”,用來引導(dǎo)目的狀語從句,從句中常含有can、may等情態(tài)動詞。so that還可以表示“因此;所以”,用來引導(dǎo)結(jié)果狀語從句,在so that前可以使用逗號。例如:

        Jim studies hard so that he can go to a good senior school.吉姆努力學(xué)習(xí)以便能考上好的高中。

        Yesterday morning he got up early,so that he caught the first bus.昨天早晨他起得很早,因此他趕上了早班車。

        ◎中考鏈接

        1.In summer,food will go bad quickly_______we put it into a fridge.

        【2018·蘭州中考題】

        A.ifB.unless

        C.as soon asD.while

        【答案與解析】B句意:在夏天,我們要把食物放進冰箱,否則食物很快就會壞。根據(jù)常識可知,在夏天要想食物不變壞,就要把它放進冰箱里。unless相當(dāng)于if...not...,用來引導(dǎo)條件狀語從句。故選B項。

        2.Shestoppedtalking_________her mother came into the room.

        【2018·宜賓中考題】

        A.as soon as

        B.unless

        C.though

        【答案與解析】A句意:她的母親一進房間,她就停止了談話。根據(jù)句意可知此處要用表示“一……就……”的as soon as引導(dǎo)時間狀語從句。故選A項。

        3.—What a mess!The sharing bikes are thrown everywhere.

        —Let's collect and put them in the right place_______they can be used conveni-ently.

        【2018·東營中考題】

        A.unlessB.so that

        C.becauseD.so long as

        【答案與解析】B句意:——真是一團糟!共享單車被丟得到處都是。——讓我們把它們收集起來放在合適的地方,這樣就可以被方便地使用了。根據(jù)句意可知,此處應(yīng)用表示“以便;為了”的so that來引導(dǎo)目的狀語從句。故選B項。

        4.—Harry Potteris_______an interesting novel_______I want to read it again.

        —I agree with you.

        【2018·咸寧中考題】

        A.so;thatB.too;to

        C.such;thatD.as;as

        【答案與解析】C句意:——《哈利·波特》是一本如此有趣的小說,我還想再讀一遍?!彝饽愕目捶?。第二個空白處后面是一個句子,排除B、D項。novel是名詞,排除A項。故選C項。

        5.Hefelt_______surprisedthat he couldn't say a word with his mouth wide open.

        【2016·內(nèi)江中考題】

        A.veryB.such

        C.soD.too

        【答案與解析】Cvery和too后面不能接句子,排除A、D項。surprised是形容詞,應(yīng)用so修飾。故選C項。

        ◎自我檢測

        Ⅰ.選擇正確的答案填空。

        1.Tina is_______nervous_______she can't talk in front of the class.

        A.such;that

        B.too;to

        C.so;that

        D.enough;to

        2.Your dream will not come true_______you keep trying your best.

        A.whenB.unless

        C.whetherD.because

        3.—Did you catch the early bus this morning?

        —Yes.Thebusstartedtomove_______I got on it.

        A.thoughB.before

        C.as soon asD.ever since

        4.I looked through the test paper again and again_______I wouldn't make any mistakes.

        A.ifB.because

        C.even thoughD.so that

        Ⅱ.按要求完成下列句子。每空一詞。

        1.I can't give you any money unless you tell me what you want to buy.(改為同義句)

        I can't give you any money_______you_______tell me what you want to buy.

        2.He is so young that he can't look after himself.(改為簡單句)

        He is_______young______________after himself.

        3.The boy saved money in order to buy his mother a present.(改為復(fù)合句)

        Theboysavedmoney_______ _______he could buy his mother a present.

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