for free为介词+形容词构成固定搭配
for free义务地;无偿地;免费地 (英文解释:If you do something or get something for free, you do it without being paid or get it without having to pay for it.)
I wasn't expecting you to do it for free.
我并没有指望你白干。
Why waste £50 when you could get it for free?
能够免费得到为什么还要浪费50英镑呢?
备注:for free还可以表达批评意见时用于强调,意思不管怎样。
I'll tell you one thing for free: I can't stand him.
不管怎样我都要说:我受不了他。
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