你刚才有听清楚老师说什么吗？

Nǐ gāngcái yǒu tīng qīngchu lǎoshī shuō shénme ma?

Did you hear clearly what the teacher said just now?

你看清楚了没有？

Nǐ kàn qīngchu le méiyǒu?

Did you see clearly?

如果你看不清楚白板上的字，那么请你告诉我。

Rúguǒ nǐ kàn bù qīngchu bǎibǎn shàng de zì, nàme qǐng nǐ gàosu wǒ.

If you can't see the letters on the whiteboard clearly, then please tell me.