Hi.
I've just come across this thread with a verified answer, but I'm doubtful about it.
Adding to their importance is [that many of the lifeline systems serve vital roles in disaster recovery].
To me, the underlined part is the subject of the sentence, and the bracketed part is subject complement. Is it right?
Persian Learner Adding to their importance That seems adverbial to me, fronted and the sentence with inverted S-V.
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Persian LearnerAdding to their importance
That seems adverbial to me, fronted and the sentence with inverted S-V.