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问题: 关于piror to的用法.

piror to 后面加 ing ?

解答:

Prior to+名词或者动名词
在...之前, 比...优先,居先, 在前
This task is prior to all others.
这项任务比所有其它任务都重要。
It happened prior to my arrival.
这发生在我到达之前。
What did you do prior to coming here?
你来这里之前做什么事?
The contract will be signed prior to the ceremony.
合同将在仪式举行之前签字。