Question

Modify the underlined clause into an adverb phrase in the sentence given below:
Since coming back to India, Sameera has fallen sick. [Advanced]

• A. NO CHANGE
• B. Since Sameera came back to India, she has fallen sick.
• C. After Sameera came back to India, she has fallen sick.
• D. Because Sameera coming back to India, she has fallen sick.

Answer 1

The correct option is A NO CHANGE

An adverb clause is a group of words containing a subject and a verb, and it functions as an adverb, by modifying an adjective, verb or an adverb. Adverb clauses generally begin with a subordinate conjunction (since, because, while, etc.)
Generally, while reducing an adverb clause to a phrase, the subject is removed and the verb is changed to a present participle (verb + ing). (If there is an auxiliary/helping verb attached, it is removed.)
The underlined words form a phrase; it has no subject. Hence the underlined words are already an adverb phrase (with the adverb of time "since") and option A is correct.
Option B is incorrect because it is a clause, with the subject "Sameera" and the verb "came".
Option C is incorrect because the words form a clause, they're the same as in option B, with the difference of the adverb "after".
Option D is incorrect because the phrase "because Sameera coming back to India" is grammatically incorrect, there is a subject but no verb.