表被动的就是只有一个过去分词做定语 如,he found the book bought buy his mother yesterday 改成定语从句he found the book which was bought buy his mother yesterday 表完成的是having+done,是做状语,不能做定语 如,he gave me a pound having received the letter
单个词作定语限定修饰名词要放在其前面,叫前置定语 如果是短语就要放在其后,叫后置定语. 分词包括现在分词和过去分词,又称为非谓语动词, 可以做定语,如果是短语就要后置. he walked in the street, followed by his son. he walked in the street, following his son.