He could (has, have) blocked her along the way.
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Simple Past Future Tense Subject-Verb AgreementImperative SentenceParticiple Clauses & Cleft SentencesModals-Ing and Infinitive Verb PatternsArticles and QuantifiersComparativesPronouns and Subject Verb Agreement
Other quiz:Relative Pronouns › View
Michael is the boy…..is wearing the green jacket.
Grammar › View
I____ (eat) lunch every day.
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