Hi! I'm Tim from BBC Learning English
and today I'm going to tell you about three useful words:
because, as and since.
These are all used to give reasons.
'Because' is more common than 'as' or 'since'
and we use it when we want to focus on the reason.
I'm tired because I didn't sleep very well.
When we want to give extra focus to the reason,
we can put the 'because' clause
at the beginning of the sentence.
Because my bed is uncomfortable,
I'm getting a bad back.
'As' and 'since' are more formal than 'because'
and we use them to focus on the result
rather than the reason.
I hope Tom's brought that comic
as I wanted to borrow it from him.
Noodles are popular since they're easy to cook.
We often use 'as' and 'since' clauses
at the beginning of the sentence.
Just remember to add a comma.
So, as our minute is up,
I'll finish recording this video.