" It becomes more complicated when you ask a question, because you have to worry about the person, number and tense of the principle verb (to mean) and also the person, number and tense of the auxilliary verb (helping verb) to do. It means nothing. It meant nothing.
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Avangi use the bare infinitive of the principle verb, "to mean." What does it mean? What did it mean?
To be more specific about your error, you failed to use the infinitive form of the principle verb, mean. You used the simple present and past of both the principle verb and the auxilliary verb. You might call it an error in v
Grammarian-bot I was in a hurryNo worries, mate. Richard's "word form" may well be the accepted term for the error, rather than "verb formation."