1、中文：他们成婚两年了。

　　(误)They have married for two years.

　　(正)They have been married for two years.(表明已婚状况的继续，要用完结时的被迫式。)

　　2、中文：他被一切学生讪笑。

　　(误)He was laughed by all the pupils.

　　(正)He was laughed at by all the pupils.(不及物动词+介词=及物动词，变被迫语态时介词不能省掉。)

　　3、中文：英语难学。

　　(误)English is difficult to be learned.

　　(正)English is difficult to learn.(英语难学=学英语难，也可说It's difficult to learn English.原句的主语实际上是不定式的逻辑宾语，不定式要用自动方式。)

　　4、中文：汤姆问我这些岛屿是不是归于美国。

　　(误)Tom asked me if these islands are belonged to America.

　　(正)Tom asked me if these islands belonged to America.

　　5、中文：我国发生了很大改变。

　　(误)Great changes have been taken place in China.

　　(正)Great changes have taken place in China.