Is he is a suspect?
2.他们的财务状况令人怀疑。
Their financial position seemed to be doubtful.
3.我又不是三岁小孩。
I wasn't born yesterday.
4.我不怀疑你的话。
I don't doubt your words.
5.我对此半信半疑。
I'll take that with a grain of salt.
6.他被怀疑是得了癌症。
He is suspected to be afflicted with cancer.
7.我才不信呢!
I know better than that.
8.你一定是在开玩笑。
You can't be senous.
9.我直接得到的消息。
I got it straight from the horse's mouth.
10.我几乎不敢相信。
I can hardly believe it.
11.你以为我会相信这故事吗?
Do you think I'd believe a story like that?
12.但这是真的。
But it's true.
13.这是巧合。
That's coincidence.
14.记住下次要准时。
Remember to be punctual next time.
15.我不怀疑你的能力。
I've no doubt of your ability.
16.你有把握成功吗?
Were you puite sure about your success?
17.这事你能肯定吗?
Are you certain about that?
18.我断定他们迷路了。
I bet they've got lost.
19.我确信事情会变好的。
I'm quite convinced things will improve.
20.很难说。
It's hard to tell.
21.我确信如此。
That's my conviction.
22.你这样认为?
You think so?
23.我认为他在说谎。
I think he is lying.
24.我怎么会相信一周内同样的理由用了两次?
How can I believe it if the same excuse was used twice with in a week?
25.马克得了奖学金?!我才不相信这种鬼话呢。
Mark has won the scholarship?!I don't buy it.
终极加油站：
financial position(财务状况)coincidence(巧合)get lost(迷路)be afflicted with(感染)with a grain of salt(有保留地)
