Breakdown of Le chien est obéissant, alors que le chat ne fait que dormir.
être
to be
le chat
the cat
le chien
the dog
faire
to do, to make
Questions & Answers about Le chien est obéissant, alors que le chat ne fait que dormir.
Why use alors que here instead of tandis que?
In this sentence, alors que and tandis que both mean "whereas" or "while" to show contrast between the dog and the cat, and they are completely interchangeable. alors que is slightly more common in everyday spoken French, while tandis que can sound a bit more formal.
What does ne fait que mean, and why is there no pas?
The structure ne faire que followed by an infinitive verb (like dormir) means "to do nothing but" or "to only do" that action. It is a special restrictive phrase, similar to ne ... que (only), which is why you drop the pas.
Is obéissant a verb or an adjective here?
Could I put alors que at the beginning of the sentence instead?