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.
我真失策。
I blew it. *常用俚语，表示“失败”、“失策”、“干了一件蠢事”。
I blew it. I lost the customer. (我真失策，失去了那个客户。)
Make sure it doesn't happen again. (再也不要发生这样的事了。)
I screwed up.
I messed up. (我给搞砸了。)
It's all my fault. (全都是我的错。)
毫无办法。
It can't be helped.
There's nothing you can do about it. (这事一点儿办法都没有。)
纯属浪费时间。
It's a waste of time.
How was it? (怎么样?)
It was a waste of time talking to him. (跟他谈话，纯属浪费时间。)
差不多了!
Almost! *用来表示几乎就要成功了。
Almost! (差不多了!)
Nice try. (干得不错。)
我感到悲伤。
I feel sad.
What's wrong? (怎么了?)
I feel sad. (我感到悲伤。)
I'm sad.
I'm unhappy.
我感到非常痛苦。
I feel really sad.
I'm really sad.
I'm really unhappy.
哦!天哪!
Oh, dear!
My dog died. (我的狗死了。)
Oh, dear! (哦!天哪!)
Oh, my!
Alas! *旧的说法。
呜呜!
Boohoo. *用在大声哭泣时，呜呜地哭。
我的心都碎了。
My heart broke.
I felt heart broken.
我的内心充满了悲伤。
My heart has been filled with grief. *be filled with... 表示“充满……”，grief 表示“极度悲伤”、“悲叹”。
那悲惨的故事使我心情抑郁。
The sad story depressed me. *depress 表示“使消沉，使沮丧”。
The sad story really brought me down. *bring...down “使……灰心丧气”。
真无情!
How ruthless!
She stole my customer. (她抢走了我的客人。)
How ruthless! (真残忍!)
How uncaring!
How cruel!
没人能知道我的感受。
No one can understand how I really feel.
Please talk to me. (请跟我说说吧。)
No one can understand how I really feel. (没人能明白我的真实感受。)
No one can relate to me.
Nobody understands my feelings.