Now let me tell you how come.这句话哪个地方错了呀!

now let me tell you how to come there.

人教版六年级上册英语书21页，Let's read

LZ是中国式的英文了。按中文语法来翻译的 。

now let me tell you HOW you come你反了...

好几种啊= =
Now tell me how you come?
Now tell me you how to come there
Now ,you come here ,tell me how to do it next?
原题是什么