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Learn how English speakers use the present perfect simple to explain the present with finished, past actions. This lesson is for students at a pre-intermediate level.

Learn how to make the present perfect simple, including the helping verb have, and past participle. This video is for students at a pre-intermediate level.

Learn one reason for using the present perfect simple in English. This video is for students at a pre-intermediate level.

Learn when to use the present perfect simple and when to use the past simple. This is part two in a two-part series. This video is for students at a pre-intermediate level.

Learn how to make and spell comparative adjectives correctly. This video is for students at a pre-intermediate level.

This video is on how to write a successful persuasive, opinion-based academic essay in English. Students will learn how to structure and organize an opinion essay and will be given tips to make their essays successful.

Body language affects how others see us, but it may also change how we see ourselves. Social psychologist Amy Cuddy shows how "power posing" -- standing in a posture of confidence, even when we don't feel confident -- can affect testosterone and cortisol levels in the brain, and might even have an impact on our chances for success.