except與except for的區別
（1）except表示“除去，不包括”，強調所排除的“不包括在內”，壹般表示同類之間的關系，常同nothing, all, none, nobody, any等不定代詞以及every連用。except 經常接名詞或代詞，但也可接副詞，介詞短語，例如：
① The office is open every day except Sundays. 除了星期日這家公司每天都營業。
② You can have any of the cakes except this one. 除了這塊蛋糕，妳哪塊都能吃。
③ She saw nothing except snow. 除了雪她什麽也沒看見。（nothing except = nothing but = only）
（2）except經常接名詞、代詞，也可接副詞，介詞短語，不帶to的不定式或從句等。例如：
④ She looked everywhere except here. 除了這裏，她到處看。
⑤ You may drop in at any time except at noon. 除了中午，妳任何時候來都可以。
⑥ She doesn’t do anything except sit and watch TV. 除了坐著看電視外，她什麽也不做。
⑦ It was a good hotel except that it was rather noisy. 這家旅館還不錯，只可惜吵。
⑧ He usually goes to work by bicycle except when it rains. 除了下雨的時候，他通常騎自行車去上班。
（3）except for也表示“除…以外”，指對某種基本情況進行具體的細節方面的修正。它同except的區別是：except for後接的詞同句子中的整體詞（主語）不是同類的，指從整體中除去壹個細節，壹個方面；而except後接的詞同整體詞（主語）壹般是同類，指在同類的整體中除去壹個部分。例如:
⑨ I can answer all the questions except for the last one. 除了最後壹題外，所有題目我都可以解答。
⑩ Your writing is good except for a few grammar mistakes. 除了幾處語法錯誤外，妳的作文寫得很好。
except,besides,except for用法的關聯和區別
1.作介詞用法時,這三個詞都有"除…之外"的含義,但except常與do／does／did／have／has／had nothing等詞形成搭配用法,或者與全部肯定詞all、everything、ev?eryone等連用,或者與全部否定詞nothing、nobody等連用,因此except加賓語作介詞"除…之外"時常表示從整體中剔除壹部分；而besides作"除…之外"時則表示"另外附加"的含義,相當於"in addition to"。試比較下列例句:
1)He did not hing except watch TV yesterday.
2)He said nothing except to smile just now.
3)All the students took at rip except Tom yesterday.
4)We need 3 more persons to finish the job besides／inaddition to us two.
2.作介詞用法時的except後可接多種情況的介詞短語。在這種情況下,except後的介詞是不可省去的,except加介詞的實際作用就相當於連詞加相關的從句。例如:
1)The weather is fine today except in the northwest.此句相當於:
The weather is fine today except that it is in the northwest.
2)His mother never takes any exercise except on the dance floor.此句相當於:
His mother never takes any exercise except that she has adance on the floor.
需要強調的是except與exceptfor的用法區別:
1)Except後排除的內容與主語往往是同壹類的,而exceptfor後所排除的內容與主語往往不是同壹類的。例如,試比較:
All the buildings are excellent except this one.
All the buildings are excellent except for their location或者All the buildings are excellent except that the place on which the buid?ings are built is notgood.
2)當except用在句首時往往改用exceptfor。例如:
There was no single person in the dark street that night except apoliceman on his duty.此句相當於:
Except for apoliceman on his duty,there was no single person in the dark street that night.
3.相當於連詞用法的except與相當於連詞用法的besides的區別仍然保持它們作介詞用法的含義。試比較下列例句:
1)Tom is a good student ex?cept that he is careless.此句相當於:Tom is a goods tudent except for his carelessness.
2)Tom seldom comes late to school except when it rains hard.此句相當於:Tom seldom comes late to school except on a heavily rainy day.
except/except for/except that/except when 的區別
（1）except表示“除去，不包括”，強調所排除的“不包括在內”，壹般表示同類之間的關系，常同nothing, all, none, nobody, any等不定代詞以及every連用。except 經常接名詞或代詞，但也可接副詞，介詞短語，例如：
① The office is open every day except Sundays. 除了星期日這家公司每天都營業。
② You can have any of the cakes except this one. 除了這塊蛋糕，妳哪塊都能吃。
③ She saw nothing except snow. 除了雪她什麽也沒看見。（nothing except = nothing but = only）
（2）except經常接名詞、代詞，也可接副詞，介詞短語，不帶to的不定式或從句等。例如：
④ She looked everywhere except here. 除了這裏，她到處看。
⑤ You may drop in at any time except at noon. 除了中午，妳任何時候來都可以。
⑥ She doesn’t do anything except sit and watch TV. 除了坐著看電視外，她什麽也不做。
⑦ It was a good hotel except that it was rather noisy. 這家旅館還不錯，只可惜吵。
⑧ He usually goes to work by bicycle except when it rains. 除了下雨的時候，他通常騎自行車去上班。
（3）except for也表示“除……以外”，指對某種基本情況進行具體的細節方面的修正。它同except的區別是：except for後接的詞同句子中的整體詞（主語）不是同類的，指從整體中除去壹個細節，壹個方面；而except後接的詞同整體詞（主語）壹般是同類，指在同類的整體中除去壹個部分。例如:
⑨ I can answer all the questions except for the last one. 除了最後壹題外，所有題目我都可以解答。
⑩ Your writing is good except for a few grammar mistakes. 除了幾處語法錯誤外，妳的作文寫得很好。