我将于明天之前让人做完这件事。

I'll have it done by tomorrow.

《牛津词典》

要你今天做完这件事会很难。

You'll be hard pushed to finish this today.

《牛津词典》

我们想要以最低的价钱做完这件事。

We want to do this all at the lowest cost possible.

youdao

I don't know if it's possible to finish this by the end of today.

我不知道我们能不能在今天之内把这件事做完。

I don't know 课堂 - SpeakingMax英语口语达人