我不知道的英文：
I don't know.

参考例句：

I don't know whether we can catch the train.
我不知道能否赶得上火车。

I have no idea what soya lecithin is.
我不知道什么是大豆卵磷脂。

I know nothing to the contrary.
我不知道有和这相反的情况。

I don't know how to care for East African land snail.
我不知道怎么养巨型蜗牛。

I don't know why Fred is always secretive as regards his family.
我不知道为什么凡涉及到他的家，弗雷德总是保密。

I wonder how your religious beliefs would translate into political action.
我不知道你的宗教信仰如何转化为政治行动。

I know not what vent-hole daylight habitually illumined his soul
我不知道是怎样一种黯淡的光经常照着他的心。

I do not know where family doctors acquired illegibly perplexing handwriting.
我不知道家庭医生从哪儿学来的那种看不明白、令人迷惑的书法。

I do not know the dignity of their birth but I do know the glory of their death.
我不知道他们是否生得尊贵，但是我知道他们是死得光荣。

Mom, Dad's birthday is coming up. I don't know what to give him. Do you have any ideas for a gift?
妈妈,爸爸的生日快到了。我不知道送给他点什么好。你有什么建议?

don是什么意思：
n.
1. 君，先生，阁下
2. 西班牙绅士(或贵族)，西班牙人
3.【美俚】黑手党头目；犯罪集团的头领
v.[T]
1. 穿上，披上（外衣等）；戴上（帽）；身穿（某种料子或颜色的衣服）
2. 摆出…的架子，装出…的样子

Don't be mad at me.
不要对我大发脾气。

Don't be a chicken!
别当个懦夫！

Don' t talk drivel!
别说傻话！

Don't fantasize,ever.
不要心存幻想，永远不要。

Don't have the papers crimped.
别把试卷弄褶皱了。

know是什么意思：
v. 知道，了解，懂得；认识，熟悉；认出；体验；见到过，听到过

Learn not and know not
不学无术

Know/not know what is most important and act accordingly
能[不能]按轻重缓急行事

Do you know that lady?
你认识那位夫人吗？

Do you know the Hallelujah Chorus?
你知道哈利路亚合唱曲吗？

Few know and few care.
很少有人知道，也很少有人关心。