Renewable energy uses energy sources that are not "used up". Examples of non-renewable energy sources include fossil fuels like coal and oil. Once we use or burn these resources, they are gone forever. Much of the world relies on non-renewable energy t

Every topic sentence will have a topic and a controlling idea. The controlling idea shows the direction the paragraph will take. Here are some examples: Topic Sentence: There are many reasons why population in Tehran is the worst in the world. The topi

Mother’s Day is a day for many people to show their appreciation towards mothers . It is an annual event but is held at different dates in the calendar, depending on the country. Happy mother's Day

Persian art and architecture reflects a 5,000-year-old cultural tradition shaped by the diverse cultures that have displayed on the vast Iranian plateau. In the words of Arthur Pope: "All around the world, Iranian carpets are the symbol of poetical luxur

The present perfect is formed from the present tense of the verb have and the past participle of a verb.

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