[ Present Perfect Tense ]
They________________(not/buy) a Computer.
A. hasn’t buy
B. hasn’t bought
C. haven’t buy
D. haven’t bought

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Parts of Speech and Compound SentencesQuantifiers and ArticlesGrammar and PunctuationVerb + Infinitive or GerundPresent Simple and ContinuousSubject Verb Agreement Irregular VerbModal Verbs and Contrastive ConjunctionsConjunctive Adverbs and PunctuationModals and Adjectives (ed-ing)Simple vs Continuous Past TenseOther quiz:
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A. An
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A. Participle
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