Which of the following sentences are grammatically incorrect?
(a) Do you play the cricket at school?
(b) She has danced for two hours last night.
(c) He gave his brother a typewriter.
(d) She is the smartest girl in our class.

Question

Accepted Answer

Option 1 is the correct answer because sentences (a) and (b) are grammatically incorrect. Here's why:

*   **(a) Do you play the cricket at school?** This sentence is incorrect because the definite article "the" is generally not used before the names of sports. The correct sentence would be: "Do you play cricket at school?"

*   **(b) She has danced for two hours last night.** This sentence is incorrect because it mixes present perfect tense ("has danced") with a past time marker ("last night"). The present perfect tense describes actions that started in the past and continue to the present, or have a result in the present. "Last night" indicates a specific point in the past, requiring the simple past tense. The correct sentence would be: "She danced for two hours last night."

Now, let's explain why the other options are incorrect:

*   **Option 2: Sentences (b) and (c)** Sentence (b) is incorrect as explained above. However, sentence (c), "He gave his brother a typewriter," is grammatically correct. It follows the standard subject-verb-object structure and uses correct verb tense.

*   **Option 3: Sentences (c) and (d)** Both sentence (c), "He gave his brother a typewriter," and sentence (d), "She is the smartest girl in our class," are grammatically correct. Sentence (d) correctly uses the superlative adjective "smartest" to compare the girl to all others in the class.

*   **Option 4: Sentences (a) and (d)** Sentence (a) is incorrect as explained above. However, sentence (d), "She is the smartest girl in our class," is grammatically correct.