We use as + adjective + as to make comparisons when the things we’re comparing are somehow equal.
- My car is as fast as yours.
- Laila is as thin as Nina.
- You’re as brave as your father.
In these examples, an adjective is placed between the two ‘as’, since two nouns are compared. So, how is the phrase “as … as” used with an adverb?
- You should drive the car as carefully as you can.
In this example, an adverb is placed between two ‘as’ because what we want to qualify is how an action should be done.
To compare unequal things not as + adj. / adv + as is used.
- Her hair is not as long as yours.
- For me, Chemistry is not as hard as Math.
- You’re writing not as neatly as you should.