The following peculiarities in the use of Prepositions should be noted.
SINCE & FROM
Both of these denote a point of time and not a space or period.
But SINCE is preceded by a Verb in some Perfect Tense, while FROM can be used with
any form of Tense. Another difference is that SINCE can be used only in reference to past time, whereas FROM can be also used for present and future time.
1. He has been ill since Thursday last.
2. He studied Latin from the age of ten.
1. The increased scale of salaries will operate from today.
2. From Monday next the library will close at 8 p.m.