Select the most appropriate option that can substitute the highlighted words in the given sentence.
She said she would join us later, but I don’t knew if she will make it on time.

Correct option is A

The correct substitution of the highlighted words is (a) but I don’t know.
Explanation: The verb “knew” is the past tense of "know", but the helping verb "don’t" is present. So, “don’t knew” is grammatically incorrect. The correct present tense is “don’t know”.
Grammatical Rule:
Present simple tense: Subject + do/does + base verb
✔ Correct: I don’t know
✖ Incorrect: I don’t knew
Example: I don’t know what time she’ll arrive.
�� Information Booster: Always use the base form of the verb after do/does/don’t/doesn’t.