What context can I use each word in?
Learn when and how to use these words with these examples!
cos
Example
I can't go out tonight cos I have to study. [cos: conjunction]
Example
He's not coming to the party cos he's feeling sick. [cos: conjunction]
because
Example
I can't go out tonight because I have to study. [because: conjunction]
Example
He's not coming to the party because he's feeling sick. [because: conjunction]
Good things to know
Which word is more common?
Because is more commonly used than cos in both American and British English. Cos is an informal spelling and is typically used in casual conversations or text messages.
What’s the difference in the tone of formality between cos and because?
Because is more formal than cos. While because can be used in both formal and informal contexts, cos is typically used in casual conversations or text messages.
