The 按…来…structure
"On the basis of..."
The 按…来… 
structure is used to describe an action that is based on something else.
A complement is placed after 按. It expresses a phenomenon on the basis of which an act is performed. These are often requirements, standards or rules.
structure is used to describe an action that is based on something else.
A complement is placed after 按. It expresses a phenomenon on the basis of which an act is performed. These are often requirements, standards or rules.Examples
按标准来判断
to assess based on standards
àn biāozhǔn lái pànduàn
A verb is used as a predicate and is placed after 来.
Scheme
subject
按
complement
来
predicate
Examples
我们一定要按要求来完成任务
We absolutely have to complete the task based on the requirements
wǒmen yídìng yào àn yāoqiú lái wánchéng rènwù
这个问题我们只能按规定来决定
We can only resolve this issue according to the rules
zhè ge wèntí wǒmen zhǐ néng àn guīdìng lái juédìng
按 can sometimes be replaced with the adverb 按照 .
.Examples
工资是按照工龄来计算的
Wage is calculated based on experience
gōngzī shì ànzhào gōnglíng lái jìsuàn de