[GIU] UNIT112 Unless/ As long as/ Provided/Providing

​​​UNIT112
​​Unless/ As long as/ Provided/providing

​​​A. ​Unless
Study this example situation:
The club is for members only.
You can't go in ​unless you are a member.
This means:
You can't go in except if you are a member or
You can go in only if you are a member.

​Unless = except if.

I'll see you next month ​unless I have to work late. (= except if I have to work late)
There are few buses to the forest. ​Unless you have a car, it's difficult to get there.
"Should I tell your mother about me?" "​Not unless she asks you."
(= only if she asks you)
We can take a bus to Gyeongju - ​unless you'd prefer to take a train.
(= except if you'd prefer to take a train)

unless대신 if... not이 자주 사용됨:
​Unless I leave now, I'll be late. or ​If I don't leave now, I'll...

​​​B. ​As long as, etc.
​as long as or ​so long as
​provided (that) or ​providing (that)

All these expressions mean "if" or "on condition that."

You can borrow my car ​as long as you promise not to drove too fast.
(= you can borrow my car ​as long as you promise not to drive too fast - this is a condition)
​Providing (that) the room is clean, I don't care which hotel we stay at.
(= the room must be clean - otherwise, I don't care)

​​​C. 미래에 대해 얘기할 때 ​unless/ as long as/ so long as/ provided/ providing 뒤에 ​will 사용하지 않음. 현재시제 사용:
I'm not going out ​unless it ​stops raining. (not unless it will stop)
​Providing the weather is good, we're going to run in Gyeongju. (not providing the weather will be good)