天气变冷了，你要多穿一点衣服。

Tiānqì biàn lěng le, nǐ yào duō chuān yìdiǎn yīfu.

The weather has turned cold; you should wear more clothes.

这条街十年没见，已经变成了商业中心。

Zhè tiáo jiē shí nián méi jiàn, yǐjīng biànchéng le shāngyè zhōngxīn.

I haven’t seen this street for ten years; it has already turned into a commercial center.

几年不见，他变得更高也更安静了。

Jǐ nián bú jiàn, tā biàn de gèng gāo yě gèng ānjìng le.

After not seeing him for several years, he has become taller and quieter.