这两句英文语法正确吗1.Put one's money where one's mouth is 2.put one'm

都没问题.
Put one's money where one's mouth is 是一句常见的成语,其中的 where one's mouth is 是位置状语从句.
put one's money in the place where one's mouth is 在语法上虽有争议（的确有点啰嗦!）,但现在人们也趋向接受 the place where 的说法.比如,把这一句改成：put one's money back in the place where it should be,听上去就很自然了.

第一句是对的。
你以后可以用google搜索来验证。