问一道高一英语语法题

是非谓语,she和hear是主动关系,所以用ing
as soon as 只能加句子

现在分词短语作状语，不是状语从句作状语，因此不用从属连词。

应该是As soon as she heard what I said,she burst into tears.
Hearing what I said,she burst into tears.是状语从句。

如果用as soon as ...因为是介词开头，从句就要用倒装了，就应该变为did she burst into tears. 所以用hearing what I said ,这相当于when she heard what I said.

___what i said,she burst into tears.
这里为什么是hearing而不能是 as soon as hearing?
as soon as 是连词 要加句子

Hearing what I said是状语
其实相当于when she heard what I said这个状语从句
as soon as 前一个as是副词而后一个as是连词
连词一般连接并列成分或者句子