29:29'must have', 'might have', 'should have' & 'can't have' to talk about the past: Live English Class
BBC Learning English
MIT 20.219 Becoming the Next Bill Nye: Writing and Hosting the Educational Show, IAP 2015 View the complete course: http://ocw.mit.edu/20-219IAP15 Instructor: Elizabeth Choe Elizabeth reflects on the challenge of providing students with both the conceptual frameworks and the practical skills they need to do their projects in a short period of time. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Published 2016-03-02 · Watch on YouTube ↗
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29:29BBC Learning English
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26:06The Royal Institution
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