到那时

• by that time
• until then
• till then
• by then

例句

1. 到那时我才知道这消息。
   It was only then that I knew the story.
2. 到那时她在这里就工作了三十年了。
   By that time she would have been working here for thirty years.
3. 她到那时就要退休了。
   She'll have retired by then.
4. 明年圣诞结婚吧，因为到那时你已经拿到硕士学位了。
   Be married next Christmas, for you will have got your master's degree by then.