Question

he left after mh departure convert simple sentence into complex sentence each containing adverbial clause
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Answer 1

Answer

I departed after he left.

Explanation:

A simple sentence can be converted into a complex sentence by expanding a word or phrase into a subordinate clause - which can be a noun clause, an adjective clause or an adverb clause. Note that it is usually a noun or a noun equivalent that can be changed into a noun clause.