defining clause....

Defining clauses:
1) No comma
2) The important information on something. If the defining clause is removed, your sentence becomes confusing or it doesn't make sense at all.
Examples:
The man whose father is my uncle was arrested this morning.
whose father is my uncle<-------defining clause ( no comma)
Now let's remove this clause.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
THE MAN was arrested this morning.<---------------

A confusing subject= the man!!!!!
The man whose father is my uncle was arrested this morning. ( CLEAR NOW)
_____________________________________
Let me show you one more example.
The lady who gave you $ 1000 the other day died this morning.
who gave you $1000 the other day<------- defining clause with no comma
Note: " who" is used to describe " the lady".
Let me remove this clause for you now.

The lady died this morning. <----------------
WHO was the lady?<--------------------------------------------
That's it.
:)
Hope that helps.

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In grammar, a clause is a pair of words or group of words that consists of a subject and a predicate, although in some languages and some types of clauses, the subject may not appear explicitly as a noun phrase. It may instead be marked on the verb (this is especially common in null subject languages.) The most basic kind of sentence consists of a single clause; more complicated sentences may contain multiple clauses, including clauses contained within clauses.

A group of words that contains a subject and a predicate. A clause may be either a sentence (independent clause) or a sentence-like construction included within another sentence (dependent clause).

2009-02-22 10:05:46 補充：
Examples:
* "Life moves pretty fast. If you don't stop and look around once in awhile, you could miss it."
* "All animals are equal, but some animals are more equal than others."