How do you..?

How do you say this in your language?
這個用你們的話怎么講？
而不是How to say...
How do you know that I arrived?
你怎么知道我到了呢？
How do you call him?
你怎么稱呼他？
不是How to call...

A:Sorry,Jane.I'm writing an e-mail.Can you help me with the spelling?
打擾一下，簡，我正在寫郵件。你能告訴我這些單詞的拼寫嗎？
B:Sure.
當然可以。
A:How to spell"purchase"?
“purchase”怎么拼？
B:Pardon?You should say"How do you spell?"
你說什么？你應該說“該怎么拼？”
A:Oh,sorry.How do you spell"purchase"?
哦，對不起，請問該怎么拼“purchase”?
B:Purchase?What does that mean?
Purchase?什么意思？
A:Purchase....You know....I want to purchase some goods.
Purchase...你知道...比如，我想purchase一些東西。
B:Ahhhh!Purchase!P-U-R-C-H-A-S-E.
啊...!Purchase!P-U-R-C-H-A-S-E.
A:Purchase...Ok!And how to spell...sorry...how do you spell"character"?
Purchase..好的。還有，怎么拼....不好意思，請問“character”怎么拼？
B:I'm sorry,Gary.What's a "character"?
不好意思，加里，什么是“chacater”?
A:Like a chinese character.
比如說漢語中的漢字。
B:Oh,you mean character.That's C-H-A-R-A-C-T-E-R.
哦..你說的是character.C-H-A-R-A-C-T-E-R.