Question

英语难题求助

There`s kind of false precision being hawked by people claiming they are doing ancestry testing. claiming为什么用动名词，它是做定语修饰people吗

Answer 1

是的，后接宾语从句，省略了that。
不定式、现在分词、过去分词都能作作后置定语，而动名词不作后置定语。先看例句：
① The problem to be discussed at the meeting is very important.
② The problem discussed discussed at the meeting is very important.
③ The problem being discussed at the meeting is very important.
辨析：上面例句分别用不定式、现在分词、过去分词作后置定语，是因为它们存在不同的情况：不定式作定语，表示动作正要进行（未发生）；现在分词作定语，表示动作正在进行（正在发生）；过去分词作定语，表示动作已完成（已发生）。据此，我们可以把上面的例句还原为定语从句作定语的句子，这样学生就更容易理解：
① The problem to be discussed at the meeting is very important.=The problem ( which is ) to be discussed at the meeting is very important.
② The problem discussed at the meeting is very important.= The problem (which was ) discussed at the meeting is very important.
③ The problem being discussed at the meeting is very important.= The problem (which is ) being discussed at the meeting is very important.