English grammar.
When we are talking about two consecutive events of the future.
First event we describe with the 'will'- We will do something. And after the ending of our first part of sentence we are proseeding with ' and then ' bla,bla,bla, coming along further with the second part of our story.
Is it necessary to put the second event in the form of ' will have done' or it is a matter of choice?

Thanks.

Question

English grammar.
When we are talking about two consecutive events of the future. 
First event we describe with the 'will'-> We will do something. And after the ending of our first part of sentence we are proseeding with ' and then ' bla,bla,bla, coming along further with the second part of our story.
Is it necessary to put the second event in the form of ' will have done' or it is a matter of choice?

Thanks.

Answer

I am not clear about your question. For future events in series, there would be no place for "will have done". For example, you might say "next year I will graduate, and then I will buy a new car". Also possible is "next year I will graduate and then (will) buy a new car". Adding the second "will" in the example sounds strange to me, but I think it is correct grammatically.

Answer

OK. I understand. To answer your question, I think it is necessary to use future perfect tense in that case, saying "will have discovered fire." It describes an event happening in some unknown future time. For correct usage, I don't think it's optional.

Answer

Here's an example:
"Someday when men have conquered the winds,the waves,the tides and gravity,we WILL HARNESS for God the energies of love, and THEN, for a second time in the history of the world, man WILL HAVE DISCOVERED fire." Written by some philosopher.

لا تفوّت فرصة تعلّم لغة جديدة وأنت مرتاح في منزلك. تصفّح مجموعتنا المختارة من مدرّسي اللغات ذوي الخبرة وسجّل في درسك الأول الآن!