>>> words
['The', 'Quick', 'Brown', 'Fox', 'Jumps', 'Over', 'The', 'Lazy', 'Dog']
>>> [words[i:i+3] for i in range(len(words) - 2)]
[['The', 'Quick', 'Brown'], ['Quick', 'Brown', 'Fox'], ['Brown', 'Fox', 'Jumps'], ['Fox', 'Jumps', 'Over'], ['Jumps', 'Over', 'The'], ['Over', 'The', 'Lazy'], ['The', 'Lazy', 'Dog']]