Representing when, where, how and why

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Choosing between because and it is because

We use it is because when we want to make the reason sound more emphatic. Consider the following dialogue:

A: Why didn't you tell me?
B: Because I didn't see you at that time.

In this case, it would be rather odd to say It is because I didn't see you at that time. It is because has the effect of making the reason sound much more emphatic, and if the speaker does not actually intend to be emphatic, the speaker can sound unintentionally rude:

A: Why are you continuing your workout business?
B: It's because I enjoy it. (Bank of English)

04conten.gif (549 bytes) Introduction
04conten.gif (549 bytes) Using adverbial clauses beginning with because
 Choosing between because and it is because
04conten.gif (549 bytes) Choosing between it is because and this is because
04conten.gif (549 bytes) Using prepositional phrases