Choose the correct alternative to replace the bold part to make the sentence grammatically correct.
He teach us grammar.

Correct option is B

✔️ The correct substitution is (b) teaches.
Explanation:
The subject “He” is third person singular. In present simple tense, the verb must agree with the subject. Hence, the correct verb form is “teaches.”
Grammatical Rule Used:
· In present simple tense, for third person singular (he, she, it), the verb must end in -s or -es.
Explanation of the Rule in Hindi:
✔️ जब कर्ता तीसरे पुरुष एकवचन (he, she, it) होता है तो Present Simple में क्रिया के अंत में “s” या “es” जोड़ा जाता है।
उदाहरण:
· गलत: He teach us.
· सही: He teaches us.
Meanings of Other Options:
· ❌ (a) Taught – Past tense form; not suitable as the sentence is in present tense.
· Hindi: “Taught” भूतकाल में प्रयुक्त होता है।
· ❌ (c) Teaching – Present participle; requires auxiliary verb.
· Hindi: “Teaching” को प्रयोग करने के लिए “is/was” जैसे सहायक क्रिया की जरूरत होती है।
· ❌ (d) No improvement – Original sentence violates subject-verb agreement.
· Hindi: "He teach" वाक्य व्याकरण की दृष्टि से गलत है।