Topic: Right Form of Verb,

Best Answer Explained in Below-:

In the sentence "As I reached home, I saw my sister -------- for help," the correct answer is A) shouting. This choice is appropriate because of the grammatical structure of the sentence and the context in which it is used.

When we use the verb "saw," it typically indicates that we observed an action taking place. The gerund form "shouting" conveys the idea that the action of calling for help was ongoing at the moment the speaker arrived home. This aligns well with the phrase "I saw," which implies witnessing an action as it occurs.

In contrast, options B) "to shout," C) "shouted," and D) "shout" do not fit as seamlessly. "To shout" suggests an intention rather than an observed action. "Shouted" refers to a completed action, which would not effectively convey the immediacy of the situation. Lastly, "shout" is an infinitive form that does not match the need for a present participle in this context.

Overall, "shouting" captures the continuous nature of the act, making it the most suitable choice in the given sentence.