被动语态
9、中文：他试图不介入政治。
(误)He tried not to have mixed up in politics.
(正)He tried not to get mixed up in politics.(get作系动词，可代替be，后接过去分词表示被动，have无此功能。)
10、中文：据说他很富有。
(误)They say him to have been rich.
(正)He is said to have been rich.(say后不可接不定式，但它的被动语态后可接不定式。)
11、中文：那人被认为是个傻子。
(误)The man thought to be a fool.
(正)The man was thought to be a fool.(主语是动作的承受者而不是发出者，用被动语态。)