我们星期天去了主题公园玩。

Wǒmen xīngqītiān qù le zhǔtí gōngyuán wán.

We went to the theme park on Sunday.

我在公园。

Wǒ zài gōngyuán.

I am in the park.

他吃完饭去了公园散步。

Tā chīwán fàn qù le gōngyuán sànbù.

When he finished eating he went to the park for a walk.