分词作定语相当于定语从句，如Most of the people invited to the party were famous scientists. = Most of the people who wereinvited to the party were famous scientists.
典型例题
1） The first textbook ___ for teaching English as a foreign language came out in the 16th century.
A. have written B. to be written C. being written D. written
答案D. 书与写作是被动关系，应用过去分词做定语表被动，相当于定语从句 which was written
2）What\'s the language ____ in Germany?
A. speaking B. spoken C. be spoken D. to speak
