The location complement 在
There are some cases when 在 is stated after a verb and acts as a complement of the location.
Pay attention
Location complements (处所补语) follow verbs to indicate the location that the action of the verb leads to.
We use 在 
as a location complement when a person or object ends up in a certain place as a result of an action.
It should be placed after certain verbs that are closely tied to the idea of a location.
For example:
住
放
坐
站
掉
躺
We should put adverbial modifiers of place after these verbs.
as a location complement when a person or object ends up in a certain place as a result of an action.
It should be placed after certain verbs that are closely tied to the idea of a location.
For example:
住
放
坐
站
掉
躺
We should put adverbial modifiers of place after these verbs.Scheme
subject
predicate
在
place
Examples
我想坐在前边
I want to sit in front
wǒ xiǎng zuò zài qiánbian
我住在悉尼
I live in Sydney
wŏ zhù zài xīní
把盒子放在这里
Put the box here
bă hézi fàngzài zhèlĭ
You can't use location complements other verbs that don't imply motion towards something. Instead, we use 在 as a preposition. It should be placed before the adverbial modifiers of place.
For example, we cannot say:
我买东西在超市
There is only one way to say it correctly:
Examples
我在超市买东西
I shop at the supermarket
wǒ zài chāoshì mǎi dōngxi