Because vs. Because Of

'Because' and 'because of' are confused by learners. They both talk about causes and effects. In this lesson, we will learn their differences and similarities.

What Is Their Main Difference?

The main difference between 'because' and 'because of' in in their parts of speech. 'Because' is a conjunction while 'because of' is a preposition.

Similarities and Differences

Talking about Reasons

We use 'because' and 'because of' to express the reason behind an action or event. Have a look:

We can't go outside because it's raining.

We can't go outside because of the rainy weather.

Parts of Speech

'Because' is a conjunction. It is classified as subordinating conjunction:

I'm sure it was Harry's doing because he always hated her.

They failed the class because they never listen in class.

'Because of' is a two words preposition.

We had to cancel the seminar because of the lack of participants.

He has no friends because of his behavior.

How to Tell Them Apart?

In order to know when to use each of them, you have to see what you have to modify:

If you need to modify a clause, then you use 'because:'

He was always alone because he was too shy.

It is dangerous to drive when it's raining because the ground is slippery.

If you need to modify a noun, noun phrase, or pronoun, then you use 'because of:'

She couldn't attend the gala because of her sickness.

They are not allowed inside because of their age.

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