***** NOT A TEACHER *****
(1) Try to remember that a clause has a subject and a predicate (verb).
(2) A noun clause is used like a noun.
(3) I know (that) you speak two languages.
(a) We say that "you speak two languages" is a noun clause
(introduced by the conjunction "that") because it takes the place
of a noun.
(i) I know something. ("Something" is a noun. "You speak two
languages" takes the place of the noun "something."
Some more examples:
They argued about whether they should do it. (They argued about
SOMETHING.) / I wonder what he will say. (I wonder SOMETHING.)
(4) A phrase is something between a noun and a clause.
I like apples. ("apples" = noun)
I like delicious apples. ("delicious apples" = noun phrase. A phrase has a
noun and at least one more word: I like the English language. A noun
phrase does not have a verb:
Every day I read newspapers. (noun)
Every day I read very interesting newspapers. (noun phrase. No verb)
I think (that) newspapers are very important. (noun clause because
it has a verb -- are -- and because it can be replaced with the word
"something": I think SOMETHING. What do you think? That newspapers
are very important.)
Good luck on your test. Let us know how you did on the test.