这个箱子很轻，我可以拿。

Zhège xiāngzi hěn qīng, wǒ kěyǐ ná.

This suitcase is very light; I can carry it.

请你走路轻一点儿。

Qǐng nǐ zǒulù qīng yìdiǎnr.

Please walk a bit more lightly.

哇，你比我轻多了！

Wa, nǐ bǐ wǒ qīng duō le!

Wow, you are much lighter than me!