在英文表達中，主謂的搭配是永遠的核心，無論修飾的成分有多長多複雜，記得一定要找出真正的中心詞。
在GMAT語法考點中，一定要注意的一個問題就是主謂一致，這也屬於常考考點之一。主謂一致考點的常見考察形式是將句子主謂隔開，給考試造成迷惑和困擾。
有的時候劃線部分劃在謂語，需要去找題幹中未劃線的真正的主語；有的時候劃線部分在主語，需要去找題幹中未劃線的真正的謂語。
下面我們就一起來看下GMAT考試的真實例題。
1.一道題考查了二組主謂一致的判斷
The direction in which the Earth and the other solid planets—Mercury,Venus,and Mars—spins were determined from collisions with giant celestial bodies in the early history of the solar system.
（A）spins were determined from
（B）spins were determined because of
（C）spins was determined through
（D）spin was determined by
（E）spin was determined as a result of
解析：
這道題考查了二組主謂一致，一組的主語是the Earth and the other solid planets，謂語是spin；另一組的主語是direction，謂語是was。所以同時符合要求的選項只有DE。再在DE裡選擇，非常容易可以排除E選D。
2.將句中主語和謂語隔地非常遠，中間加入修飾
Recent essays by Garrison Keillor,the humorist and host of the public radio show A Prairie Home Companion,describes what might happen if Huns,Goths,and Visigoths were to invade Chicago.
(A)describes what might happen if Huns,Goths,and Visigoths were to invade
(B)describes what would happen if Huns,Goths,and Visigoths invaded
(C)describes what would happen if Huns,Goths,and Visigoths would have invaded
(D)describe what might happen if Huns,Goths,and Visigoths were to invade
(E)describe what happen if Huns,Goths,and Visigoths invade
解析：
首先，分析句子結構是：S，插入語，VO，可以發現主語是essays，並且和謂語describe相隔較遠，但根據主語essays是複數，所以排除ABC，在DE裡選擇。
The 32 species that make up the dolphin family are closely related to whales and in fact include the animal known as the killer whale,which can grow to be 30 feet long and is famous for its aggressive hunting pods.
（A）include the animal known as the killer whale,which can grow to be 30 feet long and is
（B）include the animal known as the killer whale,growing as big as 30 feet long and
（C）include the animal known as the killer whale,growing up to 30 feet long and being
（D）includes the animal known as the killer whale,which can grow as big as 30 feet long and is
（E）includes the animal known as the killer whale,which can grow to be 30 feet long and it is
解析：
根據題幹分析，主語是32 species，接下來是一長串的定語從句，跳過定從修飾，才是句子真正的謂語include，根據主語32 species是複數，所以排除DE，在ABC中選擇。
3.“of”結構常出現在主謂一致考點中，迷惑考生找不到真正的中心詞
The lack of complete historical records from the mid-to-late 1800’s have made some Black inventions difficult to trace to their originators．
（A）have made some Black inventions difficult to trace to their originators
（B）have made for difficulties in tracing some inventions by Blacks to their originators
（C）have made it difficult to trace some inventions by Blacks to their originators
（D）has made it difficult to trace some inventions to their Black originators
（E）has made it difficult in tracing some Black inventions to their originators
解析：
本題較為簡單，考主謂一致與make的用法。用上題思路，依據題幹簡化句子，發現主語是the lack，那麼謂語部分一定要用單數，不能用have。因而A、B、C均錯。
The list of animals that exhibits a preference of either using the right or the left hand(i.e.,claw,paw,or foot)has been expanded to include the lower vertebrates.
（A）exhibits a preference of either using the right or the left hand(i.e.,claw,paw,or foot)has been expanded to include
（B）exhibits the preference to use either the right or the left hand(i.e.,claw,paw,or foot)has been expanded and includes
（C）exhibit a preference in either using the right or the left hand(i.e.,claw,paw,or foot)has been expanded to include
（D）exhibit a preference for using either the right or the left hand(i.e.,claw,paw,or foot)has been expanded to include
（E）exhibit the preference as to either using the right or the left hand(i.e.,claw,paw,or foot)has been expanded and includes
解析：
題目中出現了非常明顯的“A of B”這種結構，但值得注意的是劃線部分是定語從句，那麼一定要修飾先行詞。所以找到中心詞是animals，animals是複數，謂語部分一定要用exhibit，所以排除AB，在CDE裡選擇。
閱讀更多 雷哥GMAT與商科留學 的文章
