Question

Mr.Smith who is smoking is looking for what she lost yesterday和

Mr.Smith is smoking is looking for what she lost yesterday和Mr.Smith who is smoking is looking for what she lost yesterday的意思不是一样么？？为什么要加who？可以省略么

Answer 1

Mr.Smith is smoking is looking for what she lost yesterday
错误句子，谓语不知道是is smoking还是is looking
Mr.Smith who is smoking is looking for what she lost yesterday

正确。who引导定语从句who is smoking，修饰Mr Smith

Answer 2

1. Mr.Smith  is smoking is looking for what she lost yesterday.
   错误句子。

2. Mr.Smith who is smoking is looking for what she lost yesterday.
   Mr.Smith 主语
   who is smoking 定语从句
   is looking for 谓语
   what she lost 宾语从句
   yesterday 时间状语
   正在吸烟的史密斯先生正在寻找昨天她丢的东西 。                         

Answer 3

斯密斯先生，那个正在抽烟的人在找她昨天丢失的东西。

Answer 4

应该没这个who的