表达悲伤失望情绪的英语口语

前功尽弃.

***All that for nothing. *事情进展得不那么顺利时,表示"我费了那么大的劲儿,我作出了那么多的努力,可是...".

It was all a waste.

It was all for nothing.

你真让我失望.

You let me down.

I'm sorry I didn't come to your wedding. (对不起,我没能参加你的婚礼.)

Yeah, you let me down. (是啊,我很失望.)

You disappointed me.