1) 表示目的;它的否定式是so as not to do.例如:
Tom kept quiet about the accident so as not to lose his job.汤姆对事故保持沉默是为了不丢掉他的工作。
Go in quietly so as not to wake the baby.轻点进去,别惊醒了婴儿。
2) 表示结果。例如:
Would you be so kind as to tell me the time? 劳驾,现在几点了。
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