1. I think I should have finished it by then.
    我想到那时我应该完成了。

by then是什么意思

A：Would you please weigh this letter to see what the postage is?
      麻烦您称一下这封信，看看需要多少邮资，好吗？

B：Do you want to send it by ordinary or registered mail?
      您是要寄普通信还是挂号信？

A：By ordinary air mail, please.
      请给我寄普通航空信。

B：Anything of value in it?
      里面有什么值钱的东西吗？

A：A postal order for four hundred dollars.
      一张400 美元的邮政汇票。

B：In that case, you’d better have it registered.
      既然那样，您最好寄挂号信。

A：Will I be informed when my friend gets the letter?
      当我朋友收到这封信后，我会被通知吗？

B：Yes, when your friend gets it, he’ll sign a receipt, which will be sent to you by mail. Then you can be sure it’s been received.
      是的，当您的朋友收到信后，他将签一张收据，这张收据会寄给您，您就可以确定他收到了。

A：All right, I’ll have it registered, then.
      好，那我就寄挂号信。

1. 到那时：by the way 顺便说说 | by then 到那时 | call me Jim for short 简称我为Jim

2. 911查询·英语单词

2. 到那时候：mathematics n. 数学 | by then 到那时候 | physicist n. 物理学家

3. 到那时为止：by the way 顺便 | by then 到那时为止 | by this time 到现在

4.

4. 到那个时候为止：12. on Friday night 在周五的晚上 | 13. by then 到那个时候为止 | 14. talk to her nicely 跟她好好地谈