Let me clean the blackboard.

让我来擦黑板。

I clean the blackboard and empty the bins.

我擦黑板并清空垃圾桶。

After class, students are supposed to clean the chalk off the blackboard.

下课后，学生应该擦掉黑板上的粉笔。

Need I clean the blackboard now?

我现在需要擦黑板吗？

Clean the blackboard, Wang Dawei.

把黑板擦了, 王大伟.

Could you clean the blackboard, please?

请你擦一下黑板，好吗？

Clean the blackboard with the rubber.

请用黑板擦擦黑板。

S time for you to clean the blackboard.

你该擦黑板了。你该擦黑板了。

The teacher told Tom to clean the blackboard.

老师叫汤姆擦黑板。

Who is supposed to clean the blackboard today?

今天应该由谁来擦黑板?。