If player 1 is playing, then players 4 and 5 must also play.

如果球员1正在场上比赛，那么球员4和5也必须在场上比赛。

youdao

I have been playing basketball since 4 this afternoon. I feel tired now.

我从下午4点打篮球直到现在，我觉得有点累了。

youdao

I found her playing the guitar at 4 PM yesterday.

昨天下午4点我发现她正在弹吉它。

youdao

Class 4 are playing against Class 5.

四班的同学们在和五班的同学们比赛。

youdao

Class 4 are playing against Class 5.

四班的同学们在和五班的同学们比赛。

youdao