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before
01
之前, 在...前面
ahead of someone or something in time, order, or importance
02
之前, 在前面
at a time earlier than something
03
在...前面, 在...之前
in a position or location ahead of or in front of something or someone
04
之前, 在……之前
used to indicate preference or priority of one thing over another
before
01
在...之前
earlier than a particular action or event
before
prep
例子
The children opened their presents before breakfast.
Finish your homework before dinner.
He completed the project before the deadline.
They studied for the exam together before the test date.
The surgeon explained the benefits and potential risks of lumpectomy before the procedure.
