Fill in the blank with the most appropriate word.
I'll help him if he __________.

Solution(By Examveda Team)

In the given sentence "I'll help him if he asks," the verb "asks" is in its base form without any inflection. The use of "I'll" indicates the future intention of helping. The correct answer is C. "asks" in the present simple tense.

The sentence is structured as a conditional statement, with the main clause "I'll help him" and the conditional clause "if he asks." The present simple tense is used in the conditional clause to express a possibility or likelihood of the action occurring in the future. The other options do not fit the context of the sentence. Option A is incorrect because it uses the simple present tense and not the future tense required by the main clause. Option B is in the past tense, which doesn't fit the conditional sentence structure. Option D is in the future tense, but the sentence itself already contains the future marker "I'll," making it redundant. Hence, the most appropriate word to fill in the blank is "asks" (Option C).