表示处所，范围used to indicate time, place, and scope

• 在房子前面

  in front of the house

• 在房子后面

  behind the house

• 在屋子里

  in the room

• 在心里

  in one's mind

• 在桥下

  underneath the bridge

• 在月光下

  in the moonlight

• 在阳光下

  in the sunlight

• 在思想战线上

  on the ideological battle line

• 在政治上有所准备

  be politically prepared

• 在一定意义上

  in a certain way

• 我住在学校附近。

  I live near the school.

• 他住在郊外。

  He lives in the suburbs.

• 不要在困难面前低头

  do not bow your head in the face of difficulty

表示时间used to express a point in time

• 在这以前

  before this

• 在这以后

  after this

• 在第一个五年计划期间

  in the period of the first Five Year Plan

• 在晚上工作

  work in the evening

• 在最近一个时期我哪儿也没有去。

  I have not gone anywhere recently.

• 会议在下午四点钟开。

  The meeting will begin at 4pm.

• 展览会将在下周开幕。

  The exhibition will open next week.

• 他在第二天才赶到。

  He only managed to arrive on the second day.

• 他在十一岁时到了上海。

  He arrived in Shanghai when he was eleven.

• 我喜欢在吃饭时看报。

  I like reading the newspaper at mealtimes.

• 孩子在半夜醒了。

  The child woke up in the middle of the night.

存在，生存to exist

• 父母都还在

  both parents are still alive

• 我祖母已经不在了

  my grandmother is no longer with us

• 这棵树至今还在。

  This tree survives to this day.

表示人或事物的位置used to indicate position

• 他在不在家里？

  Is he at home?

• 他在不在厂里？

  Is he at the factory?

• 他不在我们厂里了。

  He is not working in this factory any more.

• 你的位子在第七排。

  Your place is in the seventh row.

留在to remain

属于某团体to belong to

参见：在于

• 事在人为。

  Success depends on the effort one puts in.

正在used before a verb or an adjective to indicate an ongoing action or state

• 他在晒太阳。

  He is soaking up the sun.

• 谁在弹钢琴？

  Who is playing the piano?

• 他们现在在上课。

  They are in class at the moment.

• 小狗死了半年，她都还在伤心呢。

  The puppy died six months ago but she is still sad.