1.区分谓语动词及非谓语动词形式来源：考试大 [例1] The“ ashcan” school in American art being a rebellion against traditional subjects and favored the painting of back-street scenes. 992.1) [答案] B 分词being改为谓语动词的一般过去时was。 [例2] Stalagmites are produced when water to 0drop directly to the floor of a cave. (92.5) [答案] C不定词to 0drop 改为谓语动词单数第三人称形式0drops.
2. 不规则动词变化形式来源：考试大 解题要点 不规则动词很多，但TOEEL试题涉及到的却是极小量的一些，下面是较常见的一些不规则变化的动词： begin - began - begun break - broke - broken bind - broke - broken blow - bound - bound build- blew - blown build - built - built来源：考试大 choose - chose - chosen deal - dealt - dealt find - found - found grow - grew- grown hold- hold - held know - knew- known leave - left - left sell - sold - sold来源：考试大 stand - stood - stood steal - struck - stole win - won - won white- wrote written
全真例题分析来源：考试大 (1) Soil science begun with the formulation of the theory of humus in 1809. (89.10) [答案] A 过去分词begun改过一般过去时形式began。 (2) The tradition of an all-male Supreme Court was broke in the 1980*s when Sandra Day O*Connor was appointed to the Supreme Court. (88.10)来源：考试大 [答案] B break 的过去分词是booken。 (3) A citadel, a fortress designed for the defense of a city, usually standed on top of a hill. (89.1)来源：考试大 [答案] D standed是错误形式，应改为stood。
全真例题分析 (1) People have always fascinated by the parrot*s colovfal feathers and its ability to mimic human speck (94.5) [答案] A 关键词by表示动词应用被动形式，即always been fascinated。 (2) Porgy and Bess by George Gershwin has called the first truly successful North American opera.(93.10) [答案] B 根据句意，此句应用被动语态，即has been called. (3) Tariffs are the taxes or customs duties levied against goods that are import from anothey country (93.10)来源：考试大 [答案] C 正确的被动语态应用过去分词，即imported。 (4) Almost destroy by fire in 1814. The White House was rebuilt and enlarged over the next three years. (92.1) [答案] A 关键词by表明前面的动词应用被动的形式，即Almost destroyed。 (5) The unit of measurement known as a *foot* has originally based on the average size of the human foot (90.8) [答案] B 根据句意，谓语动词应用被动的形式，因而has 应改为was，而且“be based on’是固定的动词短语。