for each other

for each other
if you need each other,you'll be there for each other as much as you can.“如果你们彼此需要,那么你们要尽可能多的在彼此那里.”
应该是这意思吧?那么for就没什么用啊?

大概是这个意思的,如果你们需要彼此,你们要尽可能多的帮助彼此.
for是一个固定搭配,be there for somebody.
for:为了的意思.for you,for me,for them.

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