I don't know what to do.
I don't know what to do. (该怎么办呢?)
Don't worry, I'll help. (别担心，我来帮你。)
I'm at a loss as to what to do. (我真不知该怎么办才好。)
I'm unable to decide for myself. (我一个人决定不了。)
What shall I do? (怎么办?)
What am I supposed to do? *be supposed to “计划做……”。
What am I supposed to do? (我该怎么办?)
I don't know. Just relax, I'll help you. (我也不知道。放松点儿，我会帮助你的。)
What am I going to do?
What should I do?
We are in trouble.
We can't finish our proposal in time. (我们不能按时完成计划了。)
We are in trouble. (这下可麻烦了。)
We're in big trouble. *进一步强调不知如何是好的心情。
It's a hassle. *hassle “麻烦的事情，苦战”。
Do you like the new computer system? (你喜欢这种新计算机系统吗?)
No, it's a hassle. (不喜欢，它很费劲。)
It's a pain in the neck.
It's a pain in the ass. *低俗的说法。
It's a lot of trouble.
It's really a difficult problem.
What should we do? (我们该怎么办?)
I don't know. It's really a difficult problem. (我不知道。这真是个难题。)
It's big problem.
I don't know what to say.
I'm at a loss as to what to say. (我不知道说什么才好。) *at a loss “困惑不解，茫然不知所措”。
You got me.
I have a full house. (〈打牌中的〉我是同花顺。)
You got me. (这下可难住我了。)
I don't know.
I guess you're right. (我想你是对的。)
You win. (你赢了。)
That beats me.
He's a nuisance. *nuisance“难对付的人，麻烦的人”。
You asked for it. *“自己给自己找麻烦”。
You're stepping on my foot. (你踩着我脚呢。)
Oops! I'm sorry. (哎哟!对不起。)
I made a mistake. (我犯了一个错。)
My mistake. (是我的错。)
Oh, no! I missed the flight. (噢!不!赶不上飞机了。)
You did? (真的?)
Ah, man! *man 表示兴奋的和吃惊的口语说法。
Oh, my goodness!
Oh, my gosh!
That's the hard part.
We have to decide what to do. (我们得决定什么做。)
That's the hard part. (这正是难点。)
That's the difficult part.
I feel guilty. *有罪恶感。
I feel guilty. I was mean. (我太刻薄了，我感到很内疚。)
Don't worry about it. (不必为那事担心了。)
I feel bad about it. *虽然很在意，但还不致于有罪恶感。
I feel horrible.
It's all my fault. (都是我不好。)
I feel terrible.
You look puzzled. *puzzle “使……窘困”、“使……糊涂”。
You look puzzled. (你看来很困惑。)
I can't understand this machine. (我弄不明白这台机器。)
You look confused. (你看上去很困惑。)
The idea haunts me. *haunt “不断缠绕在心头的”、“萦绕在脑海中的”、“使心烦的”。
I can't get rid of the idea.
I can't get it out of my mind.