有 know of Peter Raubal is the only heir of Hitler that I know of.为什么要加of ,不要行不行

有 know of Peter Raubal is the only heir of Hitler that I know of.为什么要加of ,不要行不行 such as与including有什么区别吗?I know many of them,including John,Peter,and Tom. Peter is the tallest of the three.Peter is the tallest of the three .有谁知道? Peter is one of the people here who know how to operate this computer.为什么用know而不用knows know,know about,know of有什么区别? There are so many kinds of clothes in the shop ,Peter doesn't know which one to c_____ 英语绕口令peter piter为什么会有两个版本?.Peter Piper：Peter Piper picked a peck of pickled peppers,A peck of pickled peppers Peter Piper picked.If Peter Piper picked a peck of pickled peppers,How many pickled peppers did Peter Piper pi 一道用英语表达的数学题.Tom,Peter,Lucy and Lily are brother and sister.I don't know how old each of them is.I only know one of them is 16,one of them is 14,one of the boys is 12 and one of the girls is 15,and I also know Peter is older than know sb和know of sb有什么不同 know of know about请问有什么区别 为什么 peter is tired of biscuits Peter is one of the____(read)of . I know of him 和 I know about him 和 I know him 有啥区别 Please give me a d--------of Peter.I want to know his age,work,character and so on.在划线处,根据首写写单词. Why did you speak to Peter that way?Don't you know he is an old friend of my brother's Peter Peter what would Liu Tao like to know about Peter?