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Here's an example sentence in English with this tense

> On July 1st, it will have rained for 2 months

I understand that there's no such tense in Japanese, but how do I go about
expressing it?  
Here are some of my attempts

> ７月１日まで２ヶ月間で降ってくる

> ７月１日で２ヶ月間降ってくる

> ７月１日になると２ヶ月間降ってきた

Please let me know of the correct way of expressing this tense and if any of
my examples made sense at all
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2021-06-11T15:20:48.997
87028
2021-06-11T16:49:42.767
34848
question
grammar tense
How to express the future perfect progressive tense?
None of your examples makes sense. 降ってきた would be understood as meaning it has
begun to rain. 降ってくる sounds like something will come down.

I would say:

> ７月１日で２ヶ月間降った (or 降り続けた) ことになる。

* * *

If you need to add the _progressive_ aspect, the following would do:

> ７月１日で２ヶ月間降っている (or 降り続けている) ことになる。
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2021-06-11T16:24:56.497
87029
2021-06-11T16:49:42.767
2021-06-11T16:49:42.767
43676
43676
87028
answer