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高三英语下册非谓语动词不定式作状语，修饰动词，在句中表示行为目的、结果、原因。only to do表示出人意料的结果。
We hurried to the classroom only to find none there .
in order(not)to,so as(not)to用来引导目的状语,enough,too, so… as to do, such + 名词… as to do作结果状语，如:The girl was so kind as to help the old man off the bus.
We hurried to the classroom only to find none there .
in order(not)to,so as(not)to用来引导目的状语,enough,too, so… as to do, such + 名词… as to do作结果状语，如:The girl was so kind as to help the old man off the bus.
