As, since, because and for

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As can be used to refer to the reason for something. This is particularly common when the reason is already known to the listener/reader, or when it is not the most important part of the sentence.

As-clauses often come at the beginning of sentences. They are relatively formal. In an informal style, the same ideas are often expressed with so.

As and since

As and since can both be used to refer to the reason for something. They are used in the same way.

Since- and as-clauses cannot stand alone.

Because

Because often introduces new information which is not known to the listener/reader. It puts more emphasis on the reason. When the reason is the most important part of the sentence, the because-clause usually comes at the end.

A because-clause can stand alone.

For

We use a for-clause when we introduce new information. A for-clause often expresses an inference. It cannot come at the beginning. It cannot stand alone either.

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See Also

Abbreviations
Acronyms and initialisms New!
About
Above and over
Accept and agree
According to
Across
Adjectives
Adverbs
Adverbs with two forms
Affect and effect
Against
Ago
All
All and every
Already, just and yet
All and whole
Along
A lot of, lots of, plenty of, a large amount of, a great deal of
Already and all ready New!
Also
Alternate and alternative
Alternately
Although and though
Amount and Number: differences New!
And
Another
Any
Anyhow and somehow
Appear
Appositives
Around
Articles - Rules for the use and omission of articles
Article A / an
As, because, since and for
As if and as though
As and though
Ask and ask for
As well as
As well as grammar
As well as grammar exercise
As, when and while
At

 

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