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Grammar Lab
Conventions taught as concepts you own rather than questions you have seen before. Know the rule, and every question built on it becomes free.
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Ability oneThe true subject
Find the subject across a long modifier, then ask whether it already has its verb.
Ability twoSentence boundaries
Decide what is an independent clause, then punctuate to match. Period, semicolon, colon, comma.
Ability threePunctuation, then transition
Remove the illegal punctuation first. Only then let logic pick which clause the transition belongs to.