so as在句子中引导目的状语从句。
目的状语从句是指从句部分用以补充说明主句中谓语动词发生的目的的状语从句。引导目的状语从句的连词或词组一般有：so that以便，in order that以便，in case免得以防，for fear(that)惟恐以免，lest&for fear that惟恐以免为不使now that&given that因为。
1、Would you be so kind as to do me a favor，please?
你会这么好心地帮我一个忙，好吗?
2、Will you be so kind as to do it for me?
请你替我做这件事好吗?
