be sure about和make sure的意思和用法不同。make sure表示“弄確實(shí)；核實(shí)；查證”。be sure＋about+動(dòng)名詞或名詞，意為“確信……”；“對(duì)……有把握”。make sure后可加從句或動(dòng)詞不定式，be sure about后只能加名詞、代詞或動(dòng)名詞。

I make sure I make time for fishing because it's how I de-stress。

我一定會(huì)騰出時(shí)間去釣魚(yú)，因?yàn)檫@是我減壓放松的方法。

It is impossible to be sure about the value ofland。

土地的價(jià)值是無(wú)法確定的。

Be sure to give your family my regards.

務(wù)必代我向你的家人問(wèn)好。

No one knows for sure what happened.

誰(shuí)也不知道究竟發(fā)生了什么事。

She seems very sure of herself.

她好像十分自信。

He is intelligent, to be sure, but he's also very lazy.

他固然聰明，但也很懶。