You talk to some friends before class begins.
你在上课前和几个朋友闲聊。
Before class begins, sing a song in English to yourself.
课前，唱首英文歌给自己听。
Before class begins, one must come prepared, with neat attires and proper posture.
上课之前准备妥当，衣冠端正，姿势亦端。
They usually take the books from their own lockers, then go to find the right classroom before class begins.
他们通常在上课前从自己的储物柜里取出要用的课本，然后再去找上这节课的教室。
Before class begins, or before they sit down to study English, let them sing a song in English to themselves.
在英语课开始前，或者孩子开始学英语之前，让他们给自己唱一首英语歌吧。
All classes will start on time. Participants should arrive the studio 15 minutes earlier before class begins.
所有课堂准时开始，已报名之顾客该于课堂开始前15分钟到达工作室。
In the afternoon I often play games with my classmates before class begins. We have two classes in the afternoon.
下午上课前我经常和同学们玩游戏。我们下午上两节课。
Be sure to let your instructor know about any orthopedic problems or special needs you may have before the class begins.
确信你的教练知道你的整体状况，或是一些特殊需要。
Make sure you get your curriculum schedule before the class begins.
确保在上课前拿到课程表。
Arrive promptly before each class session begins.
上课之前及时到达。
Arrive promptly before each class session begins.
上课之前及时到达。
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