Which one is correct and why?
When does the first class start.
Or
When does the first class starts.
anonymous When does the first class start ? The sentence above is the correct one. After auxiliary do ( do, does, did ) you must use the plain form of the verb.
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anonymousWhen does the first class start?
The sentence above is the correct one.
After auxiliary do (do, does, did) you must use the plain form of the verb.
CJ