What existed before dinosaurs?
Does the past-tense helping verb need to "What existed"?
Does the past-tense helping verb need to "What existed"? No. The sentence is grammatically fine, if evolutionarily vague.
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kumenglishWhat existed before dinosaurs?Does the past-tense helping verb need to "What existed"?
No. The sentence is grammatically fine, if evolutionarily vague.
kumenglishWhat existed before dinosaurs?
Does the past-tense helping verb need to "What existed"?
Is the past-tense verb "did" needed in "What existed"?
I assume you mean 'did', which is used in past-tense questions.
This is the exception where we want to know the sub