The sentence 'Walter question whether he has made the right decision?' is grammatically correct.

The sentence 'Walter question whether he has made the right decision?' is grammatically correct.

• A. True
• B. False
• C. Sometimes
• D. Unknown

Answer: (B)

The main rule here is subject-verb agreement in the present simple: a singular subject like Walter needs the verb form with an -s. So the correct form is Walter questions, not Walter question. The sentence as written also ends with a question mark, which makes it look like a question, but if you’re stating Walter’s action you’d use a period, or if you mean a true question you’d rephrase to Does Walter question whether he has made the right decision? The clause after does fit the pattern fine—he has made the right decision is a correct present-perfect construction. Because the verb form is wrong (and the punctuation doesn’t align with a true question), the sentence isn’t grammatically correct.

The main rule here is subject-verb agreement in the present simple: a singular subject like Walter needs the verb form with an -s. So the correct form is Walter questions, not Walter question. The sentence as written also ends with a question mark, which makes it look like a question, but if you’re stating Walter’s action you’d use a period, or if you mean a true question you’d rephrase to Does Walter question whether he has made the right decision? The clause after does fit the pattern fine—he has made the right decision is a correct present-perfect construction. Because the verb form is wrong (and the punctuation doesn’t align with a true question), the sentence isn’t grammatically correct.