Future perfect tense sentences in Chinese (eg. "Next month I will have been married 3 years"?

Question

I have a few English sentences I'm struggling to translate to Chinese, although I'm HSK5 level. Here they are, along with my attempted translations (please be strict and critical cos I want to know the most natural way of expressing these things): You'll know when you get to Beijing 你到了北京就会知道的 Next month I'll have been married for 3 years 等到下个月我就结婚三整年了 Next year I'll have been to Beijing (and left) 等到明年我就去过北京的 I will have learned English for 12 years before I graduate from university … don't know how to translate this one :( After I've gone to Beijing, I'll plan where to go next 我去了北京以后就打算后面去哪里 (can I use 打算 like this? Meaning "the act of planning" rather than talking about a specific plan) I'll have finished by that time 那时候我已经做完了 (is the 了 right here even though I'm talking about the future?) Any help on better understanding how to deal with translating English future perfect sentences to Chinese, or examples of such sentence translations, or corrections/alterations to my example sentences would all be hugely appreciated. Thanks 哥们儿s

Answer 1

The first sentence's translation was perfect.

The second sentence 下个月我就结婚三年整了。

The third sentence should be 等到明年我就去过北京了。

The fourth sentence could be translated into 大学毕业前我学习英语的时间将达到十二个年头。

The fifth sentence should be 我去了北京以后再决定下一步去哪儿。

The better translation for the last sentence would be 到那时候我就已经做完了。