REDUCED ADVERB CLAUSES Like an adjective clause an adverb clause can be reduced when the subject of the adverb clause is the same as the
subject of the main clause. If we have a form of to be in the adverb clause, first we’ll omit the subject second we’ll
omit to be. But if we don’t have a form of to be in the adverb clause, first we’ll omit the subject second we’ll change
the verb into present participle.
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When I was walking in the park, I saw my old friend.
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When walking in the park, I saw my old friend.
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Before Bill moved to London, he worked for BBC.
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Before moving to London, Bill worked for BBC.
When the adverb clause comes before the main clause, we can even omit subordinate conjunctions.
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When I was walking in the garden, I saw my old friend.
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Walking in the garden, I saw my old friend.
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Before Bill moved to London, he worked for BBC.
