1.慣用口語句子：

I find that hard to believe.
我覺得那難以置信。
I unbelievable.
不可信。
unbelievable a. 不可信的

I'll take that with a grain of salt.
我對此半信半疑。
grain n. 一粒，一點兒
take sth. with again of salt“半信半疑地，有保留地”

I doubt it．
我對此表示懷疑。
I am still skeptical.
我仍表示懷疑。
skeptical a. 懷疑的

You can't fool me.
你蒙不了我。
fool v. 愚弄，欺騙

I'll believe it when I see it.
我要親眼見到才能相信。
Seeing is believing.
眼見為實。

I wasn't born yesterday.
我又不是三歲小孩。
句型“I was born...”表示“我出生于…”。

His decision is doubtful.
他的決定值得懷疑。
decision n. 決定，決策（動詞decide的名詞形式）
doubtful a. 可疑的

Don't expect me to believe you.
別指望我會相信你。
I don't believe you.
我不相信你。
I don't have belief in ads.
我不相信廣告。
ad=advertisement“廣告”

Get out of it!
別瞎說了！
Never tell me!
我才不信呢！

You have won the scholarship?! I don't buy it,
你得了獎學金？！我才不相信你的鬼話呢。
scholarship n. 獎學金

來源:可可英語 http://www.ccdyzl.cn/kouyu/201501/356003.shtml