as…as so…as as...as
not
so...as
We use as + adjective/adverb + (formal) we use not so + adjective/ as to make comparisons when adverb + as in comparisons to the things we are comparing say that something or someone has less of a particular quality are equal in some way. than another person or thing. The world’s biggest bull is The cycling was good but not as big as a small elephant. so hard as the cross country The weather this summer is skiing we did. as bad as last year. It hasn’t The bed was not so stopped raining for weeks. comfortable as his own. You have to unwrap it as The idea is not so silly as it carefully as you can. It’s sounds. quite fragile.
In comparisons without ‘not’, we We use “not as … as” to make use “as ... as” not “so … as”: comparisons between things which aren’t equal: ✓Your writing is as bad as mine. This bag is not as heavy as I thought it would be. ✗Your writing is so bad as mine.
Rory hasn’t grown as tall as Tommy yet.
“not so … as” is less common than “not as … as”.