He'd never been in a class before and he was not even sure that he should have been teaching.
他以前从未讲过课，他甚至不能确定自己是否应当从事教学。
I had just enough time to finish eating before the bell rang and I was off to my first class.
我在铃响前刚好有时间吃完，然后就去上第一节课了。
You're taking a journalism class and you've done some reporting before in high school, right?
你在上新闻学的课，且以前在高中做过一些报道，对吗？
We've talked about Hume before in class.
我们之前在课上讨论过休谟。
We've talked about Hume before in class, right?
我们之前在课上讨论过休谟，对吧？
This is a really good topic to do with the class before an exam because it's a little bit of a lighter topic.
这对于考试之前的一节课来说是一个非常好的课题，因为这是一个稍微轻松一点的课题。
It was two days before Christmas, and David wanted to give a card to everyone in his class.
离圣诞节还有两天，大卫想给他班上的每个人发一张卡片。
These students always sing an English song before class.
这些学生总是在课前唱一首英文歌。
The student on duty should hand out the exercise books before class.
值班生应该在上课前分发练习本。
My biology teacher, Mr. White, came to the classroom five minutes before the class began.
我的生物老师怀特先生在上课前五分钟来到了教室。
When I got into college, things changed. I suddenly found myself out of class before noon time.
当我进入大学后，情况发生了变化。我突然发现自己不到中午就下课了。
The mobile phone was a distraction to students during school hours and it also brought teachers so much trouble in class before.
手机会使学生在学校里分心，它也给老师上课带来了很多麻烦。
My chemistry teacher Mrs. Louise usually gave us the instruction paper the night before the lab class and let us read it.
我的化学老师路易丝夫人通常在实验课的前一天晚上给我们说明书，让我们阅读。
Before each math class, I see her either helping the class at the front, or bringing the homework of the class together.
每次数学课前，我都看到她要么在前面辅导同学，要么就是在把全班的作业整理在一起。
Putting up your hand before asking a question helps the class pay attention to the lesson.
在提问前举手可以帮助全班同学注意听课。
Dan's class know Dan is in the hall before they see him.
丹的同学还没见到他，就知道他在大厅里了。
To keep yourself safe in the P.E. class, you are supposed to stretch before exercising.
为了保证自己在体育课上的安全，你应该在锻炼前做伸展运动。
Children should go to bed before nine every night, or they will be sleepy in class.
孩子们应该在每天晚上九点之前上床睡觉，否则他们在课堂上就会犯困。
In class, a teacher may ask students to raise their hands before they speak.
在课堂上，老师可能会要求学生在发言前举手。
If a student has fruit, egg, bread and milk before going to school, he will learn more quickly and listen more carefully in class.
如果一个学生在上学前吃水果、鸡蛋、面包和牛奶，他会学得更快，在课堂上听得更仔细。
First-class passengers enjoy "élite" security lines and priority boarding, and disembark before the unwashed in coach, held at bay by a flight attendant, are allowed to foul the jet-way.
头等舱乘客享受“精英”安检通道，能优先登机，并能在被空乘人员管辖的经济舱普通民众“弄脏”移动通道之前，优先下飞机。
A ninth grader could get a well-earned 100 in English class but still have a way to go before she writes as well as Jane Austen.
一个九年级的学生在英语课上可能很好地得到100分，但要达到简·奥斯汀的写作水平，她还有很长的路要走。
Before class starts or at home, if you know what the lecture is on, try to read the chapter before class starts.
在课程开始之前或者是在家里，如果你知道这个课要讲什么，试着在课程开始之前看看这章的内容。
Before class, the teacher will hand some relevant materials to us and require us to prepare well for the course.
每周课前老师都会发相关资料给我们，让我们准备，然后上课时再进行小组与小组间的谈判活动。
PLEASE, make sure you tell the instructor BEFORE class if you are injured, have past injuries that need to be considered, or have any other health concerns.
请确保在上课以前告诉你的导师你是否受过伤，或者是有其他健康上的问题。
So, these things here that you have in your hand, is the results of my spontaneously going to staples before class.
你们手头上东西，都是我们在上课前买到的。
With a gentle look on her face, she paused and said, "Before class is over, I would like to share with all of you a thought which I feel is very important."
她脸上带着温柔的表情，稍稍停顿了一下，便开始讲话：“在放学前，我想跟你们分享一种我认为很重要的想法。”
However, long hair in sleep, the wind is also a more troublesome to manage, no matter how busy, I have to dress up every day before class to arrange for a bath.
然而，头发长了在睡觉、大风中也是一个比较麻烦的打理，再忙，我都必须每日起床穿衣之前要安排洗澡课。
However, long hair in sleep, the wind is also a more troublesome to manage, no matter how busy, I have to dress up every day before class to arrange for a bath.
然而，头发长了在睡觉、大风中也是一个比较麻烦的打理，再忙，我都必须每日起床穿衣之前要安排洗澡课。
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