parts of 能不能读成 "part sof"如果不能这样读 是为什么呢

parts of 能不能读成 part sof如果不能这样读 是为什么呢 a part of 和part of有什么区别吗?还有parts of,这几个短语有什么区别?能不能给我一些例句啊 the part of和the parts of 的区别 part of,parts of 2个词的区别? 是most part of还是most parts of? We were all part of it.用part 还是parts还是a part. the northern parts of China 为什么part是复数形式 one of the parts 这个part 为什么要加s a part of,part of,parts of三个词有什么区别? Part of 和a part of 和parts of的区别 a part of,part of,parts of三个词的区别? become part of 和 become a part of这两个词组都对吧?没有become parts part parts part‘s part’ 的区别 she has sent many requests for spare parts.能不能改成 .requests of spare parts a part of, the part of, part of, parts of的区别是什么?These elements become 【part of】 the interstellar gas and dust.这些元素成了星际气体和星际尘埃的一部分.请问：这里用part of对不对?为什么? only ------the surface of the earth is land.A.part of B.a part of C.parts of D.part 选什么为什么 two parts vodka,one part in the northern part of china.为什么有的地方写parts?是哪一个