Content
Comparison: (not) as… as
1. Adjective
Use as + adjective + as to say that two things or people are the same in some way.
- Bogota is as interesting as Buenos Aires. (They both are equally interesting)
Use not as + adjective + as to talk about difference between two things or people.
- The Two –star hotel isn't as expensive as the four –star hotel. (The four-star hotel is more expensive

MatthewRR. (2016). Hotel [photo]. Retrieved on 2017, May 09 from https://pixabay.com/es/santorini-oc%C3%A9ano-isla-hotel-2090252/
2. Adverb
It can also used as+ adverb + as to say that an activity is performed in a very similar way or even in the same way.
- Julia cooks as well as Peter (Julian and Peter are both good cooks).

089photoshootings. (2014). Julia and Peter cooks [photo]. Retrieved on 2017, May 09 from https://pixabay.com/es/mujer-cocina-hombre-vida-cotidiana-1979272/
Use not as + adverb + as to talk about the difference between two things or people.
- Susan couldn’t run as quickly as Mary. (Mary runs faster)

Rien13. (2016). Mary runs faster [photo]. Retrieved on 2017, May 09 from https://pixabay.com/es/corriendo-deportes-racing-atl%C3%A9tico-1904186/
3. many as… as
Use as many + plural noun + as to say the number of things are equal.
- Guadalajara receives as many tourist as Monterrey.
Use not as many as to say that two things are not equal.
- Guatemala doesn't have as many pyramids as Mexico.

K_tzito. (2016). Pyramid [photo]. Retrieved on 2017, May 09 from https://pixabay.com/es/piramide-palenque-paisaje-1649598/
4. as much as
Use as much + uncountable nouns + as, to compare two things
- New York has as much traffic as Sao Paulo.
Use not as much as to say that two things are not equal.
- Mexico doesn't produce as much wine as Italy.

Hugorouffiac. (n. d.). Nueva York [photo]. Retrieved on 2017, May 09 from https://pixabay.com/es/nueva-york-rojo-amarillo-1819861/
5. As … as + possibility
as ... as is also used to express possibility or ability.
- Can you come as soon as possible?
- Go to as many places as you can.
- We got here as fast as we could.
6. To complete a comparison with as… as, you can use
- a noun ( +verb)
- a subject pronoun + verb or an auxiliary verb
- a possessive noun or possessive pronoun
- I dance as well as my sister (dances).
- I dance as well as she dances.
I dance as well as she does. - My car is as old as Tom's.
My car is as old as his.
Formal |
Informal |
He is as tall as I am. |
He is as tall as me. |
(as me/ as her/ as him/ as us / as them)
Form
The following table will help you understand the form and use of comparing things that are of similar proportion.
as | adjetive | as | ||
---|---|---|---|---|
My car is | as | comfortable | as | yours |
My class is not | as | difficult | as | yours |
as | adverb | as | ||
---|---|---|---|---|
My sister drives | as | carefully | as | me |
I don`t sing | as | well | as | my best friend. |
To summarise comparison of equality is used to show that two things or people are similar. There is no difference between the subject and the object. It can be used with adjectives, adverbs and nouns.