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Anonymous Posted 11 years ago
Grammar

Which one is correct?

Early humans used heat... "while they were shaping their tools" or "until they have found other sources" Which is correct?
  

Top answer

Early humans used heat... "while they were shaping their tools" Correct or "until they have found other sources" Present Perfect is wrong here. Just say eg until they found other sources.

— Clive

  • Early humans used heat...
  • "while they were shaping their tools" Correct or "until they have found other sources" Present Perfect is wrong here.
  • Just say eg until they found other sources.
  • Other sources of what?
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2 Answers
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Early humans used heat... "while they were shaping their tools" Correct

or
"until they have found other sources" Present Perfect is wrong here. Just say eg until they found other sources.

Other sources of what?
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