As, since

As, since

As is used in a number of ways:

As a conjunction and is used to show the same extent or degree or to indicate equality

E.g. The little girl was singing as sweetly as a nightingale.

Or, He was as aggressive as a wolf.

It can also be used to indicate the same manner or way

E.g. You must do as I do.

Or, The daughter prepared breakfast as her mother did.

Another way is to show the reason a particular action happened.

E.g. I went to take a nap as I was worn out.

Or, She ran an extra mile as she felt energetic.

As can also indicate though.

E.g.

As creamy as the milk was, the cat refused to lap it up.

Or, Docile as she seems, she showed her belligerent attitude when faced with problems concerning her children.

Since:

Since is used in a number of ways –

As an adverb to indicate from then until now.

E.g. The Guptas have left Benares and haven’t been here since.

Or, She has not attained the first position since 2013.

It can also be used to indicate at a subsequent time.

E.g. Mary, my friend moved to Illinois and has been married since.

Or, Pramod has completed his PhD since he joined the university.

Another way for using since is to indicate continuously or intermittently from.

E.g. Toby and Brad have been friends since childhood.

Or, She has been dancing since she was four years old.

Test your understanding - Choose the correct sentence from the pair of sentences given below

1.
a. They have been friends since they were in the second grade.
b. They have been friends as they were in the second grade.

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2.
a. Shivam has been trying to learn driving since last May 2014.
b. Shivam has been trying to learn driving as last May 2014.

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3.
a. Mohini took a break since she had been working continuously for 3 hours.
b. Mohini took a break as she had been working continuously for 3 hours.

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4.
a. The jury was unanimous in their decision as the evidence was clear.
b. The jury was unanimous in their decision since the evidence was clear.
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5.
a. The young boy will be a great batsman as he has given indications of a great future.
b. The young boy will be a great batsman since he has given indications of a great future.

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