has的用法归纳总结
as做介词，意思是“作为”。
as做连词，引导原因状语从句，意思是“因为”。
as做连词，引导让步状语从句，意思是“虽然”。
as做连词，引导方式状语从句，意思是“以……方式”。
as做关系代词，引导定语从句。
Take as much time as you like.
你想花多少时间就花多少时间。
As often as not, he\'s late for work.
他上班往往迟到。
Research will be needed as a preliminary to taking a decision.
作出决定之前需要进行研究。
This year\'s results are virtually the same as last year\'s.
今年的结果几乎和去年的一样。
You will always have the bad as well as the good in the world.
人生在世总是有苦有甜。