謂語動詞
(一) 謂語動詞的主謂一致
①、主謂分割原則
例1:To the citizens of the United States, the bald eagle, America's national bird, symbolize strength and freedom.
分析:symbolize應(yīng)改為symbolizes。主語謂語用逗號分割開,主語the bald eagle為單數(shù),謂語動詞也應(yīng)該用單數(shù)形式。
②、與后者一致原則
not…but, 強調(diào)but后面的名詞,
not only…but also
③、與前者一致原則
名詞+with/together with/as well as/including+復(fù)數(shù)名詞,謂語用is,
中心詞在前面,謂語動詞應(yīng)該與前面的名詞保持一致
例:The athlete, together with his coach and several relatives, are traveling to the Olympic Games.
分析:謂語動詞應(yīng)該與the athlete 保持一致,所以are改為is
④、就近原則
or, either…or, neither…nor,
單數(shù)名詞+or+復(fù)數(shù)名詞+are
如果把句子變?yōu)橐话阋蓡柧?,也就是把be動詞提到前面,那么變?yōu)閕s
所以注意一點: 如果是陳述句,靠后面近,用復(fù)數(shù)
如果是疑問句,靠前面近,用單數(shù)
例:The structure or behavior of many protozoans are amazingly complex for single-celled animals.
分析:or應(yīng)改為and。從謂語動詞是復(fù)數(shù)形式判斷,主語應(yīng)該為復(fù)數(shù),or連接兩個名詞時動詞和后面的名詞保持一致,behavior是用單數(shù)形式,因此只有改為并列連詞and才能使主謂在數(shù)上保持一致。
⑤定語從句主語就近原則
There are five apples that are red.
apples是復(fù)數(shù),因此從句謂語動詞是復(fù)數(shù)。
例:A rocket burns propellant rapidly and most rockets carry a supply that last just a few seconds.
分析:last應(yīng)改為lasts。從句的邏輯主語a supply為單數(shù),其謂語動詞應(yīng)為單數(shù)形式。
⑥the +形容詞主謂一致
The rich are not always happier than the poor.
The rich 表示一類人,應(yīng)該用復(fù)數(shù)
⑦、倒裝句的主謂一致
改錯題倒裝句的主謂一致一般考兩種情況:
a. there be 句型
there be+名詞+名詞,那么最近的名詞決定其形式
b. between/ among 放在句首+be+名詞,名詞其實是主語,所以be和名詞保持一致
例:There are no known society in which left-handed people predominate.
分析:there be 句型由最近的名詞決定其形式,society當(dāng)然用單數(shù),所以there are 改為there is
例:Between the foothills of the Andes and the Pacific Ocean are a dry coastal strip averaging about 30 miles in width.
分析:倒裝句,are改為is
例:Among the favorite attractions at the National Air and Space Museum in Washington D.C. are the film presented on the five-story-tall screen.
分析:film應(yīng)改為films , 主語實際上是名詞,應(yīng)該與謂語動詞保持一致。
⑧、百分比結(jié)構(gòu)的主謂一致
fifty percent of + 名詞
one percent of + 名詞
謂語動詞的形式和百分比多少沒有關(guān)系,主要取決于后面的名詞,比如:
one percent of my students + are
fifty percent of my time is spent on working.
這里要強調(diào)兩個結(jié)構(gòu)
half of =fifty percent
most of + 可數(shù)名詞 + are
most of + 不可數(shù)名詞+ is
例:Nearly half of the ancient meteor craters has been found in central and eastern Canada.
分析:has been應(yīng)改為have been。介詞of的賓語為復(fù)數(shù)名詞短語,作主語的中心詞half當(dāng)然表復(fù)數(shù),相應(yīng)的謂語動詞應(yīng)為復(fù)數(shù)形式。
例:Approximately fifty percent of the package utilized in the United States are for foods and beverages.
分析:package應(yīng)改為packages。從謂語動詞用復(fù)數(shù)形式判斷出主語是復(fù)數(shù)名詞。注意food用復(fù)數(shù)表示不同種類的食品,beverage用復(fù)數(shù)表示不同種類的飲料。
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