Different Uses of AS in English – Conjunction, Preposition, Adverb
The word as is one of the most versatile in English. It can function as a conjunction (meaning because, while, when, in the same way), as a preposition (indicating role or function), and as an adverb (for making comparisons). This comprehensive lesson covers every important use with clear examples so you can use as accurately in your writing and speaking.
A) As as a Conjunction
a) As = Because (Reason)
Used to connect a cause with its result. [As + Reason, Result]
1) As it was getting late, I decided to go alone.
2) You can go first as you're the oldest.
3) I shall not go to school as it's raining.
4) As he is weak, he can't run fast.
5) As my office is nearby, I go to the office on foot.
6) As I was not feeling well, I came home.
7) I went to bed early, as I was exhausted.
8) All banks are closed as today is a holiday.
b) As = While (Two simultaneous actions)
Used to show that two actions happen at the same time.
1) I met John as I was coming home.
2) He gets more attractive as he gets older.
3) Everyone cheered and clapped as the winners received their medals.
4) Just as I was sitting down to watch TV, the phone rang.
5) The flames grew larger as the fire spread.
6) John was cleaning his room as I was reading a novel.
7) As we grow older, we become wiser.
8) I watched her as she opened the door.
9) Turn off the light as you go out.
10) They arrived as we were leaving.
c) As = When
Used to indicate a specific point in time when something happens.
1) As I reached the station, the train started.
2) As I reached there, the meeting was over.
d) As = In the Same Way / Like
Used to mean "in the same manner as".
1) John got divorced, (just) as his parents had done years before.
2) As in previous years, tickets sold very quickly this year.
3) The temple looks exactly as it did when it was built in 1920.
4) Jane told me not to ask questions, just to do as she did.
5) Do exactly as I say.
More Uses of As (Conjunction)
1) I did as you asked me to do. | As you say... | As you wish...
2) I did as you said. | Do as your parents say.
3) I will do as I want. | I did as he told me.
4) Leave the papers as they are.
5) She failed the exam, just as I said she would.
6) She arrived early, (just) as I expected.
7) As you sow, so you reap.
✅ When I reached home, I took a bath.
❌ As I reached home, I took a bath. (Not recommended for sequential actions.)
B) As as a Preposition (Role / Function)
Used to describe the purpose, role, job, or function of someone or something. As + Noun
1) She works here as a waitress.
2) It could be used as evidence against him.
3) The news came as quite a shock to us.
4) I meant it as a joke.
5) Yesterday the selectors chose Dales as the team's new captain.
6) John got a part-time evening job as an office cleaner.
7) His latest film is described as a romantic comedy.
8) I work here as a manager. | I worked as a teacher a few years ago.
9) We use the garage as a workshop. | Acting as a mediator.
10) I respect him as a teacher.
C) As as an Adverb (Comparisons)
Used to compare two things, showing they are equal in some way. As + Adjective/Adverb + As
1) He'll soon be as tall as her father.
2) It's not as good as it used to be.
3) Country life is not always as peaceful as city dwellers think.
4) She can't run as fast as she used to.
5) The apple pie was as good as the one my grandmother used to make.
6) This jacket costs twice as much as that one.
7) The bread was as hard as a brick.
8) I can't run as fast as you can. | The child sang as sweetly as a nightingale.
Other Important Uses of As
1) As = In the Role of / Being
As a brother, I wouldn't allow you to do so.
As a citizen, we should follow the rules set by the government.
2) As = In the Same Way
1) As always, he said little.
2) The 'h' in Honest is silent, as in Hour.
3) As = To Add Information
1) As you know, Julee is leaving soon.
2) She is very tall, as is her mother.
4) Just As
1) John arrived, just as I left.
2) John is just as intelligent as his brother, Tom.
3) She lost it, just as I said she would.
4) I had to go just as the conversation was getting interesting.
5) Such As (Introducing Examples)
My parents gave me some gifts such as a mobile, a laptop and a bike.
- Conjunction: because, while, when, in the same way.
- Preposition: in the role of; job or function.
- Adverb: in equal comparisons (as + adj/adv + as).
- Use a comma when starting a sentence with As (reason): As it was late, we left.
English is a language just like your mother tongue. Practise using as in all its different roles — as a reason, a comparison, or a job title — and your English will become far more precise and natural.
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