Question:

　　Dear abc,

　　I'm in a puzzle about this sentence: We've both caught colds. Why the word "cold" needs to add "s"?

　　I'll be looking forward to your answer. Thanks a lot.

　　yang caiqi

　　Answer:

　　Dear yang caiqi,

　　如果单从发音的角度老分析的话，可能告诉你的答案会让你失望，colds后面的s发音基本上可以省略掉的，所以你随便找个老外来试试，他肯定不会指出你这句话是错误的。

　　如果从语法角度来分析，其实也不难，你想想"we've both caught colds"中不是有个"both"么？

　　Yours abc