Must vs. should

[nq:1]hello all, please tell me what's the difference in usage of these two verbs: "must" and "should". which way is more convenient? - "he must do smth" / "it must to be done" / "i must do smth" or[/nq]
A strong obligation or a necessity
[nq:1]- "he should do smth" / "it should be done" / "i should do smth" etc.[/nq]
A weak obligation or a recommendation
Regards, Einde O'Callaghan

thank you for your explanations, Einde. the point is when i learned englisn in school (it was more than 20 years ego) teachers taught us to use "must". but now, when i speak english at work, everybody use only "should". what's this? maybe an echo of political correctness? or smth else?
one more question, is it widespread to say smth like "he tolds me" instead of "he told me"?
regards,

At 22:07:17 on Thu, 19 Jun 2008, dorris26
(Email Removed) wrote in
(Email Removed):
[nq:1]one more question, is it widespread to say smth like "he tolds me" instead of "he told me"?[/nq]
No. To say that would be not only absolutely wrong, but also totally illogical (trying to combine past tense with present tense!). I have never in my life heard anybody say that, and never expect t

[nq:2]A strong obligation or a necessity A weak obligation or a recommendation Regards, Einde O'Callaghan[/nq]
[nq:1]thank you for your explanations, Einde. the point is when i learned englisn in school (it was more than 20 ... i speak english at work, everybody use only "should". what's this? maybe an echo of political correctness? or smth else?[/nq]
I doubt it. They're giving advice, not

Try:

At 17:33:58 on Wed, 16 Jul 2008, (Email Removed) wrote in (Email Removed):
[nq:1]Try: [/nq]
I never saw the original post; however, MUST/SHOULD/MAY, in the context of Usenet (which is where we all are, children), is very clearly defined in ; RFC2119 / Bradner97.
Molly Mockford
They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor