the的用法,表示所有,相当于物主代词,用在表示身体部位的名词前 example：She caught me by the arm我不太明白这条用法的意思,
问题描述：
the的用法,表示所有,相当于物主代词,用在表示身体部位的名词前 example：She caught me by the arm
我不太明白这条用法的意思,
答
比如说
1 take Mary by the hand
== take Mary's hand
2 catch the robber by the arm
== catch the robber's arm
3 hit the man in the face / hit him on the cheek
== hit the man's face / cheek