交作业前仔细检查一下拼写错误。
Go over your work for spelling mistakes before you hand it in.
作业前，熟悉电路的电压和频率。
Know the voltages and frequencies of circuits before any work is done.
开始作业前，必须检查专用的悬吊绳。
The dedicated hang-off line must be inspected prior to operation.
作业前要摘掉所有可能影响安全的首饰。
Remove all jewelry that could interfere with your safety before performing any work.
交作业前要仔细检查一下。
交家庭作业前要检查一下。
在回家做作业前我还可以在外面玩30多分钟！
I have 30 more minutes to play outside before going home to finish my homework!
在机器或者被驱动设备上作业前，断开连接并采取闭锁。
Disconnect and lock out before working on the machine or the driven equipment.
开始作业前，请先自问：“为保护我的双手，我该怎么做？”
Before you begin a job, ask yourself: "What must I do to protect my hands?"
爸爸：我没有生气。但是记住，你不能够在没有做完作业前玩游戏。
Dad: no, I'm not angry. but remember, you shouldn't play computer games before.
你可以在周五前某个时候交作业。
我们通常在七点钟吃晚餐，之后我就开始做家庭作业，希望在睡觉前把它做完。
We usually have supper at seven o 'clock.then I begin to do my homework. I want to finish it before I go to bed.
请在离开前将你的作业交给我。
我要在睡觉前完成我的作业。
当然。我一个小时前就完成作业了。
看电视前你必须完成家庭作业。
你四天前就应该交上这份作业了。
你必须在每次课程结束前交出你的作业。
You must turn in your assignments at the end of each class period.
你应该在回家前完成作业。
(过去将来完成时)老师说作业在下周前交。
The teacher said the assignment would have been handed in before next week.
我妈妈经常让我10点前完成作业。
My mother often has me finish my homework before 10 o'clock.
在玩电视游乐器前我先做家庭作业。
昨晚九点前我就完成了作业。
我必须晚餐前完成作业吗？
他说他昨天睡觉前已经完成了家庭作业。
He said he had finished his homework before he went to bed yesterday.
他两小时前就完成了作业。
我相信你们可以在星期五前完成你们的作业。
考试前，我们一头扎到作业堆里。
考试前，我们一头扎到作业堆里。
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