>1.czy to zdanie jest poprawne?
>"They shouldn't have been used until people strat paying for them.'
>mialo to oznacza ze nie powinny byc uzywane dopoki ludzie nie zaczna
>za nie placic
They shouldn't have been used until (the) people started paying for them. (concerning a past situation)
They shouldn't be used until (the) people start paying for them. (now, or in the future)
>2.a i jeszcze jedno jak chcialem napisac ze deszcze zmyje bloto z
>chodnikow to czy moglem uzyc WASH OUT?
I'd rather say - 'wash off', e.g. The rain is going to wash the mud off the pavements.