29:29'must have', 'might have', 'should have' & 'can't have' to talk about the past: Live English Class
BBC Learning English
MIT 9.04 Sensory Systems, Fall 2013 View the complete course: http://ocw.mit.edu/9-04F13 Instructor: Peter H. Schiller This lecture describes form perception, including Gestalt, three major theories and properties of spatial frequency analysis. Also covered are cortical areas important to intermediate vision, subjective contours and facial recognition. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Published 2014-10-28 · Watch on YouTube ↗
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29:29BBC Learning English
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