專四練習(xí)之語法(從屬結(jié)構(gòu))-文庫吧資料
2025-08-10 23:48本頁面
【正文】 一詞，在從句中作原因狀語，在語義上相當(dāng)于 for which) ?７ . 如果 when引導(dǎo)的時間狀語從句用一般過去時，其主句用的是過去進(jìn)行時或 be about to結(jié)構(gòu)，這時主句表示從句動作發(fā)生的背景（正在或正要做某事）， when意為＂正在這時候＂，等于 and at this time. ?８ .before引導(dǎo)的時間狀語從句的兩個用法： ?1)表示＂在．．之前＂，＂趁著．．．還沒有＂，＂還沒有來得及．．．＂的意思．從句中的謂語動詞有時用情態(tài)動詞can/could ?2) it is/ was/ will be…(time) before…( 過一段時間才會．．． )的句型不要和 it is/has been…(time) since… （自．．．以來已有．．．時間了）句型混淆． ?９ .一些副詞如 instantly, immediately, directly, presently等也可以引導(dǎo)時間狀語從句． ?１０ .句型Ａ is to B what C is to D中的連接詞 what 可以用來表示比較兩種事物相同或相似的關(guān)系，相當(dāng)于 as(好比 )．整句意為“Ａ之于Ｂ就像 C之于 D 一樣 .” ?As water is to fish, so air is to man. ?Water is to fish what air is to man. ?Nine is to three what three is to one. ?１１ . 句型 “ not+比較級 +than” 與句型 “ no+比較級 +than” ?not better than沒有 … 好 . ?“no+比較級 +than” 意為 “和 … 一樣不” ,含義為 “兩者都不 …” 狀語從句的簡化 ?狀語從句的省略 簡記為 :省略主語 (或 it)和系動詞 ? 狀語從句同時具備下列兩個條件 :① 主句和從句的主語一致，或從句主語為 it；②從句主要動詞是 be的某種形式。如： ? He was very weak, so much so that he could not walk. ?5. lest有否定的意義，意為“以免以防”． Lest引導(dǎo)的從句多用助動詞 should, would, might等虛擬形式． In case引導(dǎo)的從句則較少用虛擬形式． ?We talked in a low voice lest we should wake the baby up. ?我們小聲說話以免吵醒嬰兒。 ? that， so that, in order that引導(dǎo)的目的狀語從句中常有情態(tài)動詞 can (could), may (might), will (would), shall (should)等 ? Say it louder (so) that everyone can hear you. ? I am telling you that lest you should make a mistake. ? I got up early so that I could catch the first bus. ? We39。 ? Don39。 ? In that he is ill, he feels unable to do it. 因為有病， 他覺得做不了那件事。 ? seeing (that)， now (that)， considering (that)， in that這幾個詞匯與 since引導(dǎo)的原因狀語從句意思相近， 都表示“既然”。 四 .表示條件、原因、目的和結(jié)果的狀語從句要點(diǎn)提示 ? 1. 引導(dǎo)條件狀語從句的連詞有 if, if only, unless, as(so) long as, on condition that, providing (provided /given) that, suppose (supposing) that, in case等 ? I can tell you the truth on condition that you promise to keep a secret. ? Supposing anything should go wrong, what would you do then? ? He will sign the contract provided we offer more favorable terms. ? But for the rain, we should have a pleasant journey. ? 要不是下雨 ,我們的旅行肯定會很愉快。re looking for something. ?８ .在 as引出的方式狀語從句中，當(dāng)從句的謂語與主句的謂語動詞相同時，從句的謂語動詞可用助動詞 do來代替，以免重復(fù)． ?You must try to hold the tool as I do. ?９ .引導(dǎo)比較狀語從句的連詞有 ?As…as… ?Not as (so)…as ?More than ?The more… the more ?I?m taller than he (is tall ). ? more ...the more… 句型中，前面的句子表條件，是從句，后面的句子是結(jié)果，是主句，前后均用倒裝結(jié)構(gòu)． ?The higher the temperature (is), the greater the pressure (is ). ?11. 如果主句（結(jié)果）在前，從句（條件）在后，則主句不用倒裝，只需倒裝從句： ?主＋謂＋ the more+the more+主＋謂 ?The higher the temperature (is), the greater the pressure (is ). ?The pressure is greater, the higher the temperature is. ? than引導(dǎo)的是比較狀語從句，也是一種方式狀語從句． Than從句的省略有以下幾個特點(diǎn)： ?省主，留謂，多見于正式文體 ?There were more casualties than (it)was reported. ?Don?t eat more than (what) is good for you. ?Both houses were as clean as (they) could be.
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