今天是你们值日,别躲了, 快擦黑板吧.

You are on duty today, so stop shirking and erase the blackboard!

今天值日的同学要在老师到教室前擦黑板和准备粉笔。

Students who are on duty today should erase the blackboard and prepare some chalk before the teachers come into the classroom.

我擦黑板并清空垃圾桶。

I clean the blackboard and empty the bins.

让我来擦黑板。

Let me clean the blackboard.

你该擦黑板了。你该擦黑板了。

S time for you to clean the blackboard.

我现在需要擦黑板吗？

Need I clean the blackboard now?

今天应该由谁来擦黑板?。

Who is supposed to clean the blackboard today?

让我们/让我擦黑板。

Let's/ let me clean the board.

七和八， 貒擦黑板。

Seven and eight, clean the board.

下了课我能给你擦黑板吗？。

Can I bang your erasers after class?