1.肯定式
2.否定式:not to do sth.或never to do sth.
Take care not to break it.小心別把它打破了。
You were silly not to have locked your car.你沒鎖車太傻了。
Go in quietly so as not to wake the baby.進去時不要出聲,以免把寶寶吵醒。
go in quietly in order not to wake the baby.
He has made it a rule never to cast his net more than three times a day.
他習慣于每天撒網(wǎng)不超過三次。