UNLESS/AS LONG AS/PROVIDED (THAT)
I have realized that the above mentioned expressions represent some difficulties to the learner and I therefore would like to try to explain
them a little bit. In the two windows you see further down (or here AS LONG AS) I give you the explanation of how to use unless and how to use provided/as long as.
You can do the followowing exercise while you are listening to the audio that gives you the answers.
Click here and you can do a multiple choice excercise which you can correct online.http://www.langedi49.ch/UNLESSPROVIDED.htm