介词短语补语 The prepositional phrase as a complement

The preposition “自” and its object (usually a noun of place or direction) form a prepositional phrase. “自+NP” is often used, particularly in written language, as a complement after the verbs such as “寄，来，选，出，取”, for example,
中药大多取自植物、动物和矿物。
他来自中国西北农村。
这封信寄自上海。
The following are the complements that we have already learned:
(1) The complement of state. 
    他们普通话说得很好。
（2）The complement of degree.
    这件工作可把我累坏了。
（3）The directional complement.
    他们从外边走进来了。
（4）The resultative complement
    他晚上写汉字常常写到十点。
（5）The complement of quantity
     这件衣服比那件衣服贵50块钱。
（6）他在这儿工作了半年。
（7）The action-measure complement
     老师让他念了两遍课文。
（8）The potential complement
     他今天做不完这些作业。
（9）The preposition phrase used as a complement
     我毕业于ABC商学院。