问题描述：
关于分词短语-ing与-ed形式.
Comparing the two groups of data,it is not hard for us to find it.
Compared with the group under 20years old,the other 6 age groups prefer to watch TV.为什么第一个句子用ing,第二个句子用ed.
Comparing the two groups of data,it is not hard for us to find it.
Compared with the group under 20years old,the other 6 age groups prefer to watch TV.为什么第一个句子用ing,第二个句子用ed.
问题解答：
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