Tracking satellites accurately is important for the space agency.
Simple gerund phrases are “Nouns on the Outside, Verbs on the Inside,” like some kind of crunchy grammatical cookie. The underlined phrase acts as a noun:
Something is important for the space agency.
However, inside the actual phrase, the words are arranged as if they follow a verb. Tracking satellites accurately can easily be made part of a working verb phrase: I AM tracking satellites accurately.
B. Complex Gerund Phrases
The accurate tracking of satellites is important for the space agency.
Complex gerund phrases are “Nouns Through and Through.” The -ing gerund form is made fully into a noun; in fact, it is often preceded by articles (a, anyor the) or adjectives (accurate). The object is put into an of prepositional phrase (e.g., the running of marathons) or placed in front of the -ing form (e.g., marathon running). Complex gerund phrases may sometimes sound less natural than simple gerund phrases, as in the example above.
Why on earth does this matter? The reason is that the GMAT follows very strict rules ofstructural parallelism with these gerund forms. Simple gerund phrases are NEVER PARALLEL to complex gerund phrases— even though they both are -ing forms of a verb, and both are used as nouns!
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发表于 2014-4-5 09:40:36
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