1. Adverb Clauses of Time Present Past Future By: Dr. Shadia Y. Banjar http://www.kau.edu.sa/SBANJER http://wwwdrshadiabanjar.blogspot.com
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6. Adverb Clauses of Time Form: These clauses are introduced by an adverb of time such as when , whenever, while , as , before , after , till , until , since and as soon as .