I didn't have time to change clothes before the party.

我没时间在聚会前更换衣服。

《牛津词典》

I have to change my clothes, have breakfast and go to school.

我必须换衣服、吃早饭、然后去学校。

youdao

I have to prepare for bad weather on a daily basis, so I wear biking clothes and change when I get to my destination.

我必须为坏天气做好准备，这是我每天的必要准备，因此，我穿骑车的服装，当我到达目的地时再换衣服。

youdao