'
介词in的用法：
1、在一段时间内
如:inthemoring/intheafternonn/insummer/intwoweeks
tobywasbornin1985.
iwillfinishmyhomeworkintwohours.
2、在...之内，位置
tobylivesinshenzhen.
thereisapeninthebox.
3、穿着
ihatethatgrilinblack.
isthemaninblueyourboss?
themaninwhitejaketisyourteacher.
4、用...工具
pleaseintroduceyourselfinsimpleenglish.
theyaretalkinginloudvoice.
5、在...当中，状态中
hislifeisindanger.
weareindeepsorrow.
6、在...方面
spend+时间+onsth/indoingsth
hespendstwodaysonbooks/inreadingbooks.