John helped his teacher erase the blackboard after class.

约翰课后帮老师擦黑板。

Will a black chalk chalk on a white blackboard?

黑色的粉笔会在白色的黑板字吗?

Mommy will write the words on the blackboard.

妈妈会在黑板这个单词。

He was writing something on the blackboard.

他当时正在黑板东西。

Look at the two pictures on the blackboard.

看黑板的两幅画。

Please look at the four questions on the blackboard.

请看黑板的四个问题。

Now, look at the blackboard, please, and repeat after me.

请同们现在看黑板， 并跟着我念。

The students are asked write out the answers on the blackboard.

叫去把答案在黑板。

I wrote down a bunch of ideas on the blackboard.

我在黑板了一堆点子。

He is drawing something on the blackboard with a piece of chalk.

他正用粉笔在黑板画东西。

The teacher would stand at the front. She would write on a blackboard.

老师站在教室前面。她会在黑板板书。

I can't draw oil because oil is black on a blackboard.

因为黑板也是黑的 所以我没法把石油画出来。

All right, Louis, you may join the class. Stand right here by the blackboard.

好吧，路易斯，你可以到我这个班来。就站到黑板旁边吧。

Thinking of all these things, she stepped to the blackboard and wrote CATASTROPHE.

这么想着，她走到黑板前，把“CATASTROPHE”这个单词了出来。

But there's a real high craft side to giving a beautiful lecture on a blackboard.

但课时能出一黑板漂亮的板书确实需要很高的技巧。

But there's a real high craft side to getting a beautiful lecture on a blackboard.

但在黑板进行一个漂亮的演讲确实要很高的技巧。

You could sort of scratch that panel and it was like nails being done on a blackboard.

你可以用它挠窗玻璃，就像用指甲挠黑板一样。

Many compounds are spelled as one word - as in the two words that you mentioned: classroom and blackboard.

很多复合词会成一个词的形式，就像你提到的classroom和blackboard。

Yes. Teachers won't use chalk on a blackboard and students won't use pens and paper, or erasers any more!

是的。老师不再使用粉笔在黑板字，也不再使用笔与纸，更不再使用橡皮。

He always cleans the blackboard every day.

他总是每天擦黑板。