त्वरित लिंक्स
English Language
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In the following complex sentence, identify the option that provides the most grammatically accurate, cohesive, and stylistically refined improvement for the underlined segment:Not only did the delegation negotiate the complex trade terms over three grueling days, but they also have successfully secured crucial concessions on tariff reductions before the summit concluded.
✓ Correct! Well done.
✗ Not quite — the correct answer is highlighted above.
Detailed Explanation
To ensure absolute grammatical accuracy and tense consistency in advanced English syntax, correlative structures like 'not only... but also' require parallel verb forms. The first clause uses the past tense auxiliary 'did' followed by the base verb 'negotiate' ('did... negotiate'). Therefore, the second clause must maintain the simple past tense ('successfully secured') rather than mixing it with the present perfect auxiliary ('have successfully secured'). For a deeper understanding of correlative structures and syntactic parallelism, consult the Wikipedia Reference on grammatical coordination.
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