Air composition A Lecture By Mr Allah Dad Khan Former DG Agriculture Extension Khyber Pakhtun Khwa Province & Visiting Professor Agriculture University Peshawar Pakistan

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Education

Gases of the Air a Study
By
Mr. Allah Dad Khan

Air composition A Lecture By Mr Allah Dad Khan Former DG Agriculture Extension Khyber Pakhtun Khwa Province & Visiting Professor Agriculture University Peshawar Pakistan

The document provides information on the past simple and past continuous tenses in English. It defines each tense and how they are formed affirmatively, negatively, and interrogatively. It also discusses the differences between the two tenses and provides examples of their common uses, including describing completed actions in the past versus ongoing actions at a specific time in the past. It concludes with exercises for students to practice using the correct past tense based on the context.

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