Anonymous Hello, Can you please tell me whether the following sentence is correct or incorrect? If incorrect, please explain. If mathematical thinking did not have existed, we would still have been living in caves.
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AnonymousHello,did not have existed - This combination of verbs won't work. Use "had not existed" if you wa
Can you please tell me whether the following sentence is correct or incorrect? If incorrect, please explain.
If mathematical thinking did not have existed, we would still have been living in caves.