導語：詞性混淆誤用一直是TOEEL考題中最重要的命題形式。它與“基本句子結構”和“平行結構”組成TOEEL命題的三大焦點。下面YJBYS小編解析託福詞性變化的`語法及真題，歡迎參考!
有關詞性混淆的試題主要集中在written Expression (16-40題)中，命題範圍包括：
(1)並列結構中詞性一致，
(2)形容詞與副詞混淆，
(3)形容詞與名詞混淆，
(4)名詞與動詞混淆。
其中，形容詞用錯的題型佔此類命題的最大比例。
1. 並列連詞and but or結構要求詞性統一全真例題分析
(1) Bigness. Boastful. And strong. Frontiersman Mike Fink was the subject of many folk tales.
[答案] A 並列連詞and連線三個形容詞，故(A)Bigness應改為Big。
(2) The success of a naval ship is determined by its seaworthiness, speedy ,and maneuverability.
[答案] D 並列連詞and連線三個名詞，而speed是形容詞，故應改為speed。
(3) Regulation of public utilities in the United States is carried out by locally state and federal governments.
[答案] D 並列連詞and連線三個形容詞性質的詞，共同修飾後面的中心詞governnenrfs 。而locally是副詞，應改為local。
(4) In Middle Ages. Books called bestiaries were prepared in an attempt to describe animals, real or imagine, that exemplified human traits.
[答案] B 並列連詞or前面是形容詞real。之後亦應是形容詞imaginary。
2. 形容詞錯用為副詞解題要點 形容詞用來修飾說明名詞或名詞性成分的，而副詞則可修飾除名詞以外的所有詞性及句子成分。
全真例題分析
(1) Animal life on Prince Edward island is confined large to ducks. Pheasants. And rabbits
[答案]C 修飾限定介詞短語to ducks pheasants and rabbits 應用副詞largely。
(2) The General Sherman tree a giant sequoia in California, has grown to be the world*s largest plant at approximate 272 feet tall.
[答案] D 修飾說明數詞(272)應用副詞approximately。
(3) Because its body is supported by water, the blue whale can grow to a size considerable larger than any land mammal alive today.
[答案] 修飾形容詞短語larger than…應用副詞形式considerably。
(4) Once an important port of entry for immigrants to the United States. Island recent reopened its great hall s a museum of immigration.
[答案] C 修飾整個句耶Ellis ls land reopened its great hall as a museum of immigration 應用副詞recently，表示時間。
(5) Because their properties differ from those of their constituents. Proper alloys can great increase the corrosion resistance of a metal.
[答案] C 修飾動increase 應用副詞greatly。
