gulliano By recording these phenomena carefully, the observers made a very valuable contribution to the scenario. By = preposition recording = noun, (gerund) Because recording is a gerund, it can have an object ( phenomena ), and a modifying adverb ( carefully ).. The prepositional phrase, by recordin g these phenomena carefully , is adverbial.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
gullianoBy recording these phenomena carefully, the observers made a very valuable contribution to the scenario.By = preposition