我很累，连走的力气也没有了。

Wǒ hěn lèi, lián zǒu de lìqi yě méiyǒu le.

I'm very tired, I don't even have the strength to walk.

这很重，我没力气拿。

Zhè hěn zhòng, wǒ méi lìqi ná.

This is very heavy, I don't have the strength to carry it.

他好像很有力气的样子。

Tā hǎoxiàng hěn yǒu lìqi de yàngzi.

He looks like he is very strong.