In the following sentences, underline the dependent clause and the subordinating words. Also, state their grammatical names and functions.

1) They were playing video games while he was sleeping.

2) Her project would have been brilliant if she would have written the stats .

3) Unless you return the book, you'll have to clear all the dues .

4) You can't achieve your goal when you are unfocused .

5) He took his toy, although he preferred reading books .