我们一起去看足球比赛吧。

Wǒmen yìqǐ qù kàn zúqiú bǐsài ba.

Let's go watch the football competition together.

比赛进行中。

Bǐsài jìnxíng zhōng.

The competition is underway.

我参加了歌唱比赛。

Wǒ cānjiā le gēchàng bǐsài.

I participated in a singing competition.