----The population of Africa ___(expand)all the time. ---Right. Who knows what it will be like in the years to come. This is a question created by a Chinese teacher. The given answer "is s expanding" . But I feel "has been expanding" is better. What do you think? Thank you very much!
Top answer
"is expanding" goes with "all the time". "has been expanding" doesn't go so well with "all the time". CJ
— CalifJim
"is expanding" goes with "all the time".
"has been expanding" doesn't go so well with "all the time".
CJ
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"is expanding" means that it is happening now (with an implication here that the process is continuing from the past through the present into the future).
"has been expanding" means that it happened through the past up until the present or recent past, and may or may not be happening now.