As

In comparisons, the word that is usually used in front of a noun or noun phrase is like (NOT as): ‘James is very tall, just like his father.’ ‘Their car is like ours – old and full of rust.’

As is used in the patterns (not) as...as, not so ... as, and the same (...) as: ‘James is as tall as his father.’ ‘Their car is the same colour as ours.’

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