Hi, You have to keep the definite article, "the" because you know which decades you are talking about. Dropping "the" makes the sentence grammatically incorrect. Hamid
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Alex JohnDuring last few decades .....[In this sentence I presume that the audience doesn't have any idea of how many decades I'm talking aboutYes and no. Few -means more than two, so the audience assumes at least 30 years.
Alex John