Подчеркните придаточные обстоятельственные. Переведите предложения. whatever advice you give be short.
I will believe it when i see it.
You never know what you can till you try.
While there is life there is hope.
Until the reaction is over no definite evidence can be abtained.
This value may be subject to refinement when analyses are complete.
Alyhough these two methods will require comletely dafferent control structures the techniques used will not be very different.