2 sentences

1. 我们已经付过手术费了。

   wǒ​men yǐ​jīng fù guo shǒu​shù​fèi le.

   We paid for the surgery already.

   Source: OpenSubtitles

2. 他为了筹集手术费而四处奔走。

   tā wèi le chóu​jí shǒu​shù​fèi ér sì​chù bēn​zǒu.

   He went around seeking help to raise money for the surgery fees.

   Source: Dong Chinese Dictionary