for free是副词词性

例句

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？

The company won the contract by essentially saying it would do the job for free.

那家公司基本上是靠宣称免费进行那项工作才赢得了合同。

3.

这个短语的词性是:介词短语。for是介词。