以下是幾種用英語告知對方沒有收到信件或回復的方式：

1. If you have already sent me an email, I'm afraid it seems to have gotten lost in my inbox. I apologize for any inconvenience, but could you please send it to me again?

（如果您已經給我發送了電子郵件，恐怕它似乎在我的收件箱中被遺失了。對此我感到非常抱歉，請您再次發送一份，謝謝。）

2. I hope this message finds you well. I just wanted to follow up on the email I sent last week to make sure you received it. If you haven't, could you please let me know so I can resend it?

（希望您一切都好。我只是想跟進一下我上周發送的電子郵件，確保您已經收到了。如果您沒有收到，請告訴我，這樣我就可以重新發送。）

3. I wanted to check in and make sure that you had received my previous email. If you haven't, please let me know and I'll be happy to send it again.

（我想核實一下，您是否收到了我之前的電子郵件。如果您沒有收到，請告訴我，我很樂意重新發送。）

4. I just wanted to confirm that you received the email I sent last week. If not, please let me know and I will resend it as soon as possible.

（我只是想確認您是否收到了我上周發送的電子郵件。如果沒有，請告訴我，我會盡快重新發送。）

無論哪種方式都應該表達出你的詢問和禮貌，並且給對方重新發送的機會，以便他們能夠及時收到你的信息。

可以使用以下語句來告知對方沒有收到信件或回復：

1. I haven't received your letter/email yet.

2. I haven't received any response from you yet.

3. I'm sorry, but I haven't received your message/email.

4. I haven't seen any response from you regarding my previous email.

5. It's been a while since I sent you my message, but I still haven't received a response.

6. I haven't heard back from you regarding my previous email/letter.

7. I have not received any response from you on my previous communication.

8. I'm sorry, but I haven't received any response from you to my previous request.

以上句子都可以用來告知對方沒有收到信件或回復，根據具體情況選擇合適的語句即可。

如果你沒有收到回復，你可以說"I didn't receive a reply." 或者 "I haven't received a reply." 這句話來源於英語中常用的表達方式，表示沒有收到對方的回復。