______, he talks a lot about his favorite singers after class.
A. A quiet student as he may be B. Quiet student as he may be
C. Be a quiet student as he may D. Quiet as he may be a student
这道题很有一定难度。具体说来，它主要涉及两个考点：一是让步状语从句倒装后的词序问题。让步状语从句之所以要采用倒装结构，主要是为了强调位于句首的名词、形容词、副词、动词等，其词序形式为：被强调的成分+as / though + 主语+动词。二是在倒装的让步状语从句中，位于句首的单数可数名词是否带冠词的问题。按照英语习惯，英语中的单数可数名词在泛指时，一般要有不定冠词的修饰，但是位于倒装让步状语从句句首的单数可数名词是个例外，即使泛指其前也不加不定冠词。由此可知，上面这道考题的答案应为B。
一、名词+as / though+主语+动词
King as he was, he was unhappy.
Child as he is, he knows to help other.
Teacher though he is, he can’t know everything.
Boy as [though] he is, he likes to play with girls.=Though [Although] he is a boy, he likes to play with girls.
Strong man as [though] he is, General Botha has been severely put to the test during the past few weeks.= Though [Although] he is a strong man, General Botha has been severely put to the test during the past few weeks. 波赛将军虽然坚强，但在过去的数周里也受到了严峻的考验。
二、形容词+as / though+主语+动词
Successful as he is, he is not proud.
Improbable as it seems, it’s true.
Stupid as it sounds，I was so in love with her that I believed her.
Patient as he was，he didn’t like waiting that long.
Beautiful though the necklace was，we thought it was over-priced.
三、副词+as / though+主语+动词
Much as I like Paris, I couldn’t live there.
Hard though they tried, they couldn’t make her change her mind.
Fast as you read, you can’t finish the book in two days.
He was unable to make much progress, hard as he tried.
【说明】有的词典将much as 作为习语看待，认为它是一个用以引导让步状语从句的复合连词。再如：
Much as I admire him as a writer，I do not like him as a man.
Much as I like you, I couldn’t live with you.
四、动词原形+as / though+主语+动词
Object as you may, I’ll go.
Try as he might, he couldn’t solve the problem.
Search as they would, they would find nobody in the house.
Dislike him as we may, we must acknowledge his greatness.
Lose money as I did, we got a lot of experience.
Fail in the election as he did, he became famous for his fiery speech against slavery.
【说明】主语后的动词通常为may, might, would, did 等情态动词或助动词(若表示情态意义，则选用情态动词;若陈述事实，则用did, do 等助动词)。
五、分词+as / though+主语+动词
Raining hard as it is, I’m going out for a walk.
Surrounded as we were by the enemy, we managed to march forward.
Munching the apple as he was, he had got an eye for all John’s movements.
1. 这类倒装的让步状语从句可用as, though 来引导，但不能用although来引导;但是，未倒装的让步状语从句则可用though, although来引导，而不能用as来引导。也就是说，although引导让步状语从句时不能倒装，as引导让步状语从句时必须倒装，而though引导让步状语从句时可以倒装也可以不倒装。如：
正：Late as [though] it was, we still went on working.
正：Though [Although] it was late, we still went on working.
误：Late although it was, we still went on working.
误：As it was late, we still went on working.
Tired as he was, he sat up late studying at night.
Tired as he was, he went to bed early.
Young as he was, he was equal to the task.
Young as he was, he was not equal to the task.
Cold as it was, we went out.=As cold as it was, we went out.
Successful as he is, he is not proud.=As successful as he is, he is not proud.