如果先行词在定语从句中作主语,引导词用who,(也可以用that 代替）
例如：The expert who visited our factory is Mr.Smith.
如果先行词在定语从句中作宾语,引导词用whom,(可以用that 代替,还可以省略）
例如：The girl whom I met in the street looks like Alice.
如果先行词在定语从句中作主语,引导词用who,(也可以用that 代替）
例如：The expert who visited our factory is Mr.Smith.
如果先行词在定语从句中作宾语,引导词用whom,(可以用that 代替,还可以省略）
例如：The girl whom I met in the street looks like Alice.