失望

你做那样的事使我太失望了。

nǐ zuò nà yàng de shì shǐ wǒ tài shī wàng le.

You doing something like that makes me very disappointed.

大家不要失望，我们还是有希望的。

dà jiā bú yào shī wàng, wǒ men hái shì yǒu xī wàng de.

Don't be disappointed, everyone, we still have hope.

我对他很失望。

wǒ duì tā hěn shī wàng.

I'm very disappointed in him.