in怎么读：英式读音为[ɪn]，美式读音为[ɪn]。in可作介词、副词、形容词和名词，基本含义有“在里面”、“在……内”、“进入”、“在家里”、“流行的”、“执政者”、“门路”等。
in的基本含义及用法介绍
1、作为介词时，意为在里面;在(某范围或空间内的)某一点;在(某物的形体或范围)中;在…内;在…中;进入。
例句：The kids were playing in the street.
孩子们在街上玩。
Leave the key in the lock.
把钥匙留在锁孔里。
He dipped his brush in the paint.
他把毛刷在涂料里蘸了蘸。
I haven't seen him in years.
我有好些年没见过他了。
2、作为副词时，意为在里面;在内;进入;在家里;在工作单位。
例句：I can't drink coffee with milk in.
我不能喝加牛奶的咖啡。
She opened the door and went in.
她打开门进去了。
Nobody was in when we called.
我们打电话时家里没人。
Applications must be in by April 30.
申请务必于四月三十日之前寄到。
3、作为形容词时，意为流行的;时髦的。
例句：Purple is the in colour this spring.
紫色是今年春天的流行色。
Exotic pets are the in thing right now.
奇异的宠物眼下很时髦。
Short skirts are in again.
现在又时兴穿短裙子了。
4、作为名词时，意为执政者;门路;知情者。
例句：Somebody in the know told me he's going to resign.
有知情者告诉我他要辞职了。
