- 当who做主语时，定语从句用who开头 。
当who做宾语时，并且定语从句有介词提前，比如The person with （ ）I talked was my teacher。这时只能用whom，因为with 是介词，这是介宾短语，只能用宾格形式。
- Do you see the housewindow are all broken?
Whose windows=the windows of which=of which the windows
Do you know the girl is talking with our teacher?
The house window was broken is near the school.
The movie I saw yesterday is fantastic.
The man T-shirt is red is my neighbor.
I will never forget the day Tu Youyou,a great scientist,came to our university and gave us a speech.
I have found the book in which/ the names of all the early satellites are mentioned.
The earth on which／ we live is a planet.
I”ll never forget the day on which／ I joined the League.
Is there any reason for which／ you should have a holiday？