EF 2/3 Adverb clauses

when/while?
When the phone rang, I answered it.
She watched TV while he cooked supper.
We are at SHEC while our kids are in their school.

whenever = any time, every time

You can come over whenever you want.
Whenever somebody comes to the door, the dog starts barking.

before
You can come to my house before 10 o'clock.
adverb clause- S+V
You can come to my house before I leave.

The kids did their homework before supper.
The kids did their homework before they had supper.

until
I waited for a long time until the bus came.

although, even though, though - same meaning
I turned off the TV although the program was very interesting.
Even though it is very cold today, I still go have a walk.
It is very cold today. I still go have a walk, though. DIFFERENCE SENTENCE STYLE

Though he studied hard, he still failed the test. CASUAL
Although he studied hard, he still failed the test. 
Even though he studied hard, he still failed the test.
He studied hard. He still failed the test, though. DIFFERENT SENTENCE STYLE

'While' means two things happening at the same time.
'Until' means waiting for something to happen.
I watched TV until my kids got home.
Until my kids got home, I watched TV. SOUNDS UNUSUAL

unless
She won't go to your party unless you apologize to her.
Unless you pay your gas bill, they will cut off the gas to your house.

Your English will not improve unless you speak regularly.

Something bad will happen unless you do something.

since- because- reason, why
She can't come to school since it's too cold to go out.
since- time
She has lived in Vancouver since 1998.
She has lived in Vancouver since she was 18.

as... as...
He can run as fast as you (can).
She is as tall as her mother (is).
Vancouver is as cold as Seattle (is).