如果你认真听讲，考试就不会太难。

Rúguǒ nǐ rènzhēn tīngjiǎng, kǎoshì jiù bú huì tài nán.

If you listen carefully, the exam won’t be too hard.

听讲的时候不要和同学说话。

Tīngjiǎng de shíhou búyào hé tóngxué shuōhuà.

When listening to the lecture, don’t talk with your classmates.

上课要认真听讲。

Shàngkè yào rènzhēn tīngjiǎng.

You should listen carefully in class.