你能大概说一下这个故事吗？

Nǐ néng dàgài shuō yíxià zhè gè gùshi ma?

Can you roughly tell this story?

我大概七点到你家。

Wǒ dàgài qī diǎn dào nǐ jiā.

I will arrive at your home at about seven o'clock.

我只知道这个问题的大概意思。

Wǒ zhǐ zhīdào zhège wèntí de dàgài yìsi.

I only know the general meaning of this question.