他经常去那家书店买书。

tā jīng cháng qù nà jiā shū diàn mǎi shū。

He often goes to that bookstore to buy books.

这种天气在南方很常见。

zhè zhǒng tiān qì zài nán fāng hěn cháng jiàn。

This kind of weather is very common in the south.

他常来我家玩。

tā cháng lái wǒ jiā wán。

He often comes to my home to hang out.

我们常在一起学习。

wǒ mén cháng zài yī qǐ xué xí。

We often study together.