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Ruslan
"will probably not be known" or "will not probably have been known"? 1. The long term effect of the radiation leak at Chernobyl will probably not be known for at least another fifty years. 2. The long term effect of the radiation leak at Chernobyl will not probably have been known for at least another fifty years.
8 jan 2016 17:10
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Answers · 5
Not be known. 'Have been' refers to something that has already happened 'I have been to the shop today' so cannot be used to talk about something we do not yet know.
8 januari 2016
1 is correct 2 is incorrect for the reason given you can not be referring to the future and use a past tense (have been) it just does not work
8 januari 2016
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