Dan's answer helps to distinguish demands from inquiries semantically.

The mood differences are as follows:

Demand as an imperative
                is realized by a clause without subject (the subject is the addressee):
        Get it from the teacher.
        Take the test!

Inquire / interrogative
                 is realize by inverting the subject-finite verb ordering of a
declarative:
        declarative = they were eating the at Joe's house
        interrogative = Were they eating at Joe's house?

The interrogative form can be tricky...

hope it helps






At 04:45 PM 6/23/01 +0800, you wrote:
>Hello everyone,
>
>    I'm an English learner.  In our test papers, there are always
vocabulary choices about "demand" and "inquire".  In Chinese meaning, they
are just the same, so I want to know their differences in mood ect.
>    What are the differances between them?
>
>                                                      Yours
>                                                               Piao Su
>
>To join or leave this LISTSERV list, please visit the list's web interface
at:
>     http://listserv.muohio.edu/archives/ateg.html
>and select "Join or leave the list"
>
>Visit ATEG's web site at http://ateg.org/
>
Judy

"Verbosity leads to unclear, inarticulate things."
....Governor George W. Bush, Jr., 11/30/96

To join or leave this LISTSERV list, please visit the list's web interface at:
     http://listserv.muohio.edu/archives/ateg.html
and select "Join or leave the list"

Visit ATEG's web site at http://ateg.org/