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狀語從句及連詞
While是解!
◆常接持續性的動詞，強調主從句謂語動作同時發生，常用進行時。有時還有對比意義，意為“然而”。
◆主句從句主語不同,表示“而…”
I do every single bit of housework __ my husband Bob just does the dishes now and then.
A. since                    B. while               C. when                D. as
◆While置于句首可表示As long as 或 Although
While there is life there is hope.
While I admit his good points, I can see his bad ones.

（2008湖南)______ the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.
A. If          B. While     C. Because         D. As

〖2011四川卷〗      volleyball is her main focus, she’s also great at basketball.
A. Since        B. Once       C. Unless       D. While
雖然排球是她的主要項目，但她還擅長籃球。while“雖然，盡管”。答案D。

〖2010全國Ⅰ〗Mary made coffee ________ her guests were finishing their meal .
A. so that         B. although        C. while       D. as if
so that譯為 “以便”表示目的, although譯為 “盡管, 雖然”, as if譯為 “好像”, while譯為 “當….的時候”, 因此while符合句意, 選擇C。

〖2009安徽〗—I wonder how much you charge for your services.
—The first two are free      the third costs $30.
A. while          B. until           C. when        D. before
while表轉折 “而, 然而”。根據句子意思, 前兩份免費, 而第三份要$30。

〖2006全國Ⅱ〗We thought there were 35 students in the dining hall,    , in fact, there were 40.
A.while           B.whether��      C.what         D.which
此題考查連詞的用法。while在此表示轉折, 意為 “但是, 而”。

〖2006天津〗The cost of living in Glasgow is among the lowest in Britain,      the quality of life is probably one of the highest.��
A.since           B.when           C.as           D.while
根據句中among the lowest in Britain和probably one of the highest可知前后的意義存在對比；while用作連詞, 可用于表示對比或相反的情況, “而；但是”。

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