關於英文句子文法分析的問題

英文句子也是用來傳遞信息(意思)，雖然你特意問分辨詞，但其實是要在閱讀的理解過程一起配合的，除了初級的學習時做功課要抽選認詞，使老師佑道你看得明句子的結構吧。
主詞 = 句子的主角
動詞 = 主角的動作
受詞 = 主角行動的對象/事物
副詞 = 形容動詞的形容詞
形容詞 = 形容名詞的形容詞
分詞 = 附加形容情況的動詞 [當中包括現在分詞/過去分詞作為不同方式/處境的形容]

If you look around, there are probably many coffeehouses near you. Coffee is a big, big business.

當中是先分成兩句
If you look around, there are probably many coffeehouses near you.
和
Coffee is a big, big business.

第一句當你見If便理解它是一句假設句/因果句(當中亦分為現實的假設/因果和虛擬的假設/因果)，這句是一句叫你想像的假設句：
前半句
If you look around,
你是主詞...look是動詞...round是連埋look round構成一個phrase
假如你周圍看看
後半句是主旨講出如果你去看看會見到甚麼：
there are probably many coffeehouses near you.
there are 是一齊用的「指示」句式...指向後面many coffeehouse這後半句受詞(跟主角you的行動關係的事物)，
probably是形容are「有」或前半句叫你看時會「見」的"可能性"...所以是形容動詞的副詞，
near的連接詞把你you跟受詞coffeehouses的關係表明。
[當你技術性地把句子拆開來其實令理解更複雜]

第二句較簡單
Coffee is a big, big business.

Coffee是主角/主詞
is是動詞 = 是
big, big是形容詞(重覆兩次只是修辭技巧加強力度)
business是受詞解釋主角是甚麼...
理解
咖啡是一盤大大大(很大)生意。
[英文重覆兩次已經是加強意氣，但中文用作加強時不會只講"大大"而是會"大大大"才像中文語法；當然另一種譯法/理解變為"很大"意思便通了，但讀不出原意的"大大"形態/感覺。英語仍有些時候會寫"big big big"的，轉為中文理解時便不能"大大大大大大大"下去的，所以會改寫為"極大的"。這些便是中英之間的修辭變化而不能直譯或字對字地翻譯或理解]

最佳解答似是而非, 兩句都錯
第一句
there - empty subject, many coffee houses - logical subject,
you ~ not a subject in the main clause, near you ~ prepositional phrase
第二句
Coffee 是 subject
is 是 linking verb
a big, big business ~ not an object, 不是受詞, 是 subject complement (主詞補足語)

2013-10-17 09:46:35 補充：
Correction in 評價 ~ my spelling error.
subject complement (not subject compliment)

Other example:
He is a teacher.
a teacher 不是受詞,不是 object, 是 subject complement

兩位回答者, Don't take my comment for granted. Please consult your grammar textbook. Thanks.

2013-10-17 09:57:41 補充：
I rather say:
"Selling coffee is a big business."
or
"Coffee business is a big business."

A simple sentence:-
eg:-There are (subject; verb.)
---many---(quantitative adjective.)
---coffee house--(object.)
---near you---(a phrase.)
---if you look around-----Adverb clause of condition,introductory word=if.qualifying "are"
(2)Coffee is (subject;verb)
---a,big---descriptive or qualitative adjectives
---business---object;noun.