Use as plus the adjective in its base form plus as to show equality, as in this car is as fast as that one, and not as plus adjective plus as to show inequality, as in my sister is not as tall as me. The adjective inside as…as never takes the comparative form.
Grammar Rule
The adjective inside as … as is always in the base form, never the comparative.
As…As: Rules and Examples
| Structure | Meaning | Example |
|---|---|---|
| as + adjective + as | equal | This car is as fast as that one. This test is as difficult as the last one. |
| not as + adjective + as | less than | My sister is not as tall as me. He is not as busy as his brother. |
Remember: the adjective between as … as is always in the simple form, never the comparative.
Practice Test
Instructions
Answer each question in the test below using as…as correctly to compare things. You will get a new random set of questions every time you retake the test, plus a downloadable results summary with your name and score at the end.
Comparatives – As…as (Equality and Inequality)
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Frequently Asked Questions
How do you show that two things are equal using as…as?
Use as plus the adjective in its base form plus as, as in this car is as fast as that one.
How do you show inequality using as…as?
Add not before the first as, as in my sister is not as tall as me, to show that one thing has less of a quality than the other.
Does the adjective inside as…as ever change to the comparative form?
No, the adjective always stays in its base form inside as…as, never taking -er or more.
Can as…as replace the comparative form?
Not exactly; as…as expresses equality, while the comparative form with than expresses a difference between two things.