Look at these examples to see how as and like are used.
I worked as an actor for two years.
I went home early as I felt ill.
He looks as if he hasn't slept.
As you know, this is the third time I've had to complain.
He looks like his dad.
She's like a sister to me.
Try to do something relaxing, like reading a book or having a bath.
Try this exercise to test your grammar.
- Grammar test 1
Read the explanation to learn more.
Grammar explanation
as and like are often confused since they can both be used for comparisons. There are, however, important differences.
Making comparisons
as + adjective + as and as much as
We often use the structure as + adjective + as or as much as to say if something has, or doesn't have, the same amount of that quality as something else.
She loves curry as much as I do.
He's not as tall as his brother.
It's not as expensive as the other hotel.
That dog is as big as that child!
You also have to use as in the expression the same as.
Your phone is the same as mine.
Texting is not the same as speaking in person.
like + noun
In the following comparisons, like is followed by a noun or a pronoun to say that two things are similar.
He's like a father to me.
She's acting like a child.
It's like a burger but with big mushrooms instead of bread.
There are lots of people like us.
It is also common to make comparisons using like with verbs of the senses.
She looks like her mother.
It sounds like a cat.
Nothing tastes like homemade lemonade.
It smells like medicine.
It feels like cotton.
as if/as though + clause
As if and as though can be used to compare a real situation to an imaginary situation. They are followed by a clause (a subject and verb).
You look as if you've seen a ghost.
I felt as if I was floating above the ground.
You talk as though we're never going to see each other again.
Giving examples
We can say like or such as to give examples.
You could try a team sport like football, basketball or hockey.
You should take something soft, such as a towel, to lie on.
Talking about a job or function
We can use as + noun to talk about a job or function.
I worked as a shop assistant for two years.
He used his coat as a blanket to keep warm.
as to connect two phrases
as can be used as a conjunction to connect two phrases. It can have different meanings.
as = 'because'
All the tickets were sold out as we got there too late.
As the road was closed, I had to park on the next street.
as = 'while' or 'during the time that'
She called as I was getting out of the bath.
As they were arriving, we were leaving.
as = 'in the way that'
As we expected, it started to rain.
As you know, classes restart on 15 January.
As I said, I think this project will be a challenge.
** Note that in informal speech, people sometimes say like for 'in the way that'.
Like I said, I didn't know her.
Do this exercise to test your grammar again.
- Grammar test 2
Hello Chihchieh
Yes, in informal speaking or writing, that is fine. As it says near the bottom of the Grammar explanation:
Your sentence is a good example of this.
All the best
Kirk
The LearnEnglish Team
Hello ozgecrbc,
The differences between because and as are small and really deal with whether the speaker is placing emphasis on the reason for something or the result. You can read more about it on this page:
https://dictionary.cambridge.org/us/grammar/british-grammar/as-because-or-since
While suggests that one action was already in progress when another action occurred or began. For example:
Here, the act of speaking on the phone begins before his arrival and is in progress when he arrives.
When tends to be used when two events occur at the same time, or start at the same time. This is why when tends to be used with simple forms rather than continuous. For example:
Here, dinner does not begin until he arrives. The implication is that we were waiting for him and did not want to start until he arrived. The two actions form a sequence rather than occurring simultaneously.
It is possible to use when with a similar meaning to while when there is a continuous verb:
As describes simultaneous actions. One action can occur during an already in-progress action (as with while) if a continuous verb is used, or the actions can occur at the same precise moment when simple forms are used:
We do not use as to describe sequential actions.
You can read more about this on this page:
https://dictionary.cambridge.org/us/grammar/british-grammar/as-when-or-while
Peter
The LearnEnglish Team