You talk to some friends before class begins.

你在上课前和几个朋友闲聊。

youdao

Before class begins, sing a song in English to yourself.

课前，唱首英文歌给自己听。

youdao

Make sure you get your curriculum schedule before the class begins.

确保在上课前拿到课程表。

youdao

Arrive promptly before each class session begins.

上课之前及时到达。

youdao

Arrive promptly before each class session begins.

上课之前及时到达。

youdao