>Can you give examples on the proper way to say it. Why is it not ok to say "since yesterday"?

Denis,

"since yesterday" is not inclusive. It means the same as "for today". Just as "since last week" means the same as "for this week". See my reply to Terry, Message #1285848.

>For me too english is my secondary language. Oh yeah like I had to tell you <g>

Really? I had no idea ... <g>

~~Bonnie