who 指人，在从句中作主语、宾语或表语
|
whose 指人或物，在从句中作定语
that 指人或物，在从句中作主语、宾语或表语
which 指物，在从句中作主语或宾语
|
when 指时间，在从句中作时间状语
where 指地点，在从句中作地点状语
why 指原因，在从句中作原因状语
(1)The man (whom /who/that) my mother saw in the street is my teacher.
(2)The book which/ that tells us about the earth is interesting.
(3)She lives in a house whose windows faces south.
(4)Do you know the boy whose father is an English teacher?
(5)I have never heard such stories as he tells.
(6)I’ll never forget the day when /on which I joined the army.
(7)I won’t forget the factory where / in which my father worked.
(8)Tell me the reason why you came late.