'Stop talking'.
Which of the following sentences changes the above imperative sentence into an interrogative sentence ?
(a) Did you stop talking ?
(b) Would you stop talking ?
(c) Will you stop talking ?
(d) Shall you stop talking ?
Answer options :

The correct answer is Option C ((c) only).

Key Points:
• Core Language Concept Tested: The question primarily tests the candidate's understanding of Sentence Transformation, specifically changing an Imperative sentence (a command) into an Interrogative sentence (a question) without losing the intended pragmatic force.
• Why the Correct Option is Right: The official answer key marks option 3 as correct, which identifies '(c) Will you stop talking?'. This is grammatically accurate because an imperative command directed at 'you' is best transformed into an interrogative request or rhetorical command using the future modal 'will'. It acts as a polite yet firm command disguised as a question.
• Common Exam Traps and Pitfalls: A common mistake candidates make is choosing 'Did you stop talking?' (a) because it looks like a standard question. However, this changes the meaning to a past tense inquiry, completely losing the command element of the original sentence.
• Elimination of Incorrect Options: 'Would you...' (b) is grammatically acceptable but is usually considered too polite and soft to be a direct equivalent of the abrupt 'Stop talking'. 'Shall you...' (d) is grammatically incorrect in modern English usage for a second-person command/request. Therefore, 'Will you...' remains the standard grammatical transformation taught in traditional grammar.
• Preparation Strategy: Revise standard structural transformations (e.g., adding question tags, changing mood) from standard grammar textbooks.
• Key Takeaway: Remember: To transform a direct imperative command into an interrogative sentence, the standard construction uses 'Will you...?'