主语+谓语+so/such+形容词/副词+as to do
句型“主语+谓语+so/such+形容词/副词+as to do”的特点是主句与从句的主语必须是同一个主体。"so as to do"可以是不定式的完成式、被动式或否定式。
.Your son is so unfortunate as to join so many interest classes.
.That old woman was so angry as to shake.
.It is so hot as not to move any more
.Mount Huang is so beautiful as to attract thousands of tourists.
.His voice is so loud as to influence us.
—Don't be angry.
—His behavior was so foolish as to angry Me.
—Why does Mary study hard?
—She studies so hard as to study abroad.
—He had been silent for a long time.
—He was so sad as not to say a word.
“so”和“as to”，连在一起表示结果和目的。“so that”和“so as to”都可以用来引导表示目的结果的状语。例如:She worked hard so as to get much more money. She worked hard so that she could get much more money.她努力工作是为了挣更多的钱。