in是一個介詞，它的後面一般接名詞，比如：in the car，in the room，等等，表示“在…裡面”in的後面還可以接代詞，如：You will always find a good friend in me. in後還能接動名詞，如：I am interested in reading.

介詞in的用法
1、在一段時間內
如： in the moring / in the afternonn / in summer / in two weeks
Toby was born in 1985.
I will finish my homework in two hours.
2、在……之內，表示位置
Toby lives in Shenzhen.
There is a pen in the box.
3、穿著
I hate that gril in black.
Is the man in blue your boss?
The man in white jaket is your teacher.
4、用什麼工具
Please introduce yourself in simple English.
They are talking in loud voice.
5、在……當中，狀態中
His life is in danger.
We are in deep sorrow.
6、在什麼方面
spend+時間+on sth/in doing sth
He spends two days on books/in reading books
in是一個介詞，它的後面一般接名詞，比如：in the car，in the room，等等，表示“在…裡面”in的後面還可以接代詞，如：You will always find a good friend in me. in後還能接動名詞，如：I am interested in reading.

介詞in的用法
1、在一段時間內
如： in the moring / in the afternonn / in summer / in two weeks
Toby was born in 1985.
I will finish my homework in two hours.

2、在……之內，表示位置
Toby lives in Shenzhen.
There is a pen in the box.
3、穿著
I hate that gril in black.
Is the man in blue your boss?
The man in white jaket is your teacher.

4、用什麼工具
Please introduce yourself in simple English.
They are talking in loud voice.
5、在……當中，狀態中
His life is in danger.
We are in deep sorrow.
6、在什麼方面
spend+時間+on sth/in doing sth
He spends two days on books/in reading books