前…后…
front and back; before and after; around; forward and backward
Meanings
2 senses · 7 examplesnoun
front and back; before and after; around (a certain time)
Used as a frame with two matched elements to indicate spatial or temporal sequence. Often used in idioms describing surrounding areas or chronological order.
We searched every front street and back alley, but still couldn't find it.
The police are investigating the cause and effect of the incident.
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He thought it over carefully for a long time and finally made a decision.
That celebrity walked into the venue surrounded by attendants.
This person changed from arrogant to deferential; it's truly despicable.
adverb
forward and backward; to and fro
Describes physical movement in opposite directions, often used to describe swaying, bowing, or rocking motions.
He was bending forward and backward with laughter, almost falling off his chair.
The branches were swaying back and forth in the snowstorm.