be used to 过去分词做后置定语的用法?

题目

be used to 过去分词做后置定语的用法?
1.the text in activity 2 contains 8 structures commonly used to report the findings of survey.这句是commonly used to report the findings of survey做后置定语.be used to doing sth完全习惯于做某事.为什么不用reporting,而用report.
2.但是如过不用省略形式the text in activity 2 contains 8 structures that are commonly used to report the findings of survey.

答案

1 be used to do '被用来做……’、‘被用于做……’；根据语境,表示‘8 structures’ 被用来‘报道调查的发现’
2 be used to doing‘习惯于……’、‘过去常常……’