THE POPULATION OF THE WORLD WILL BE INCREASING/will increase/will have increased TO AROUND TEN BILLION BY THE YEAR 2100.

I think the progressive form is wrong. What about the other two forms? I think they can work.
Thanks!

Original Post

Hi, Muh,

I see that 'will have increased' is the best answer here because this is a finished action by a certain date in the future and that choice is indicated by mentioning the expected number of population and using 'by + a time phrase'.

ahmed_btm posted:

I see that 'will have increased' is the best answer here because this is a finished action by a certain date in the future and that choice is indicated by mentioning the expected number of population and using 'by + a time phrase'.

I agree with Ahmed that "will have increased" is the best answer, and with you, Muh, that the progressive is wrong. While "will increase" is possible, it improperly conveys that the increase may be a sudden jump. What is needed is the idea that a process of increase will have reached a certain level by a certain date, and for that the future perfect is needed. Here is a simpler example for comparison:

  • Your child will have grown to a height of at least 4 feet by the time he or she is a teenager.
Last edited by David, Moderator

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