Do you mind opening the window/Do you mind if I open the window
 【问】 “Do you mind____?” “Go ahead，I don’t mind.”
 A. opening the window B. I open the window
 C. If I open the window D. whether I open the window(TOEFL，70. 1)
 《TOEFL、GRE解题词典》(译林出版社，P.702)给的答案是A(opening the window)。我不明白这里为什么不能用C(if I open the window)?我手头就有这样的例句：
 Do you mind if I call you later? (MD)
 【答】 上列书所给的答案是错误的。动词mind要求动名词(V-ing)作它的宾语，这是所有的语法书都着重加以强调的：
 Do you mind waiting? (CGEL)
 叫你等待你不介意吧?
 这也是各类标准英语考试所经常考核的一个内容：
 1. “May I help you? You’ve lots of things to carry.” “Would you mind____for me?”A. carrying these books B. carry these books
 C. to carry these books D. will carry these books(TOEFL，75.5)
 2. I wonder if you’d mind____.
 A. to get the engine started B. getting started the engine
 C. getting the engine started D. to get starting the engine(TOEFL)
 3. you mind me a glass water and aspirin? (TOEFL)
 然而，Do (would) you mind if I...也是常见的句型：
 1. Do you mind if I come up and sit around the office? (Hemingway)
 如果我上来坐到办公室旁边，你介意吗?
 2. Would you mind if I took one of these books—as a keepsake? (Greene)
 如果我从这些书中拿一本作为纪念，你介意吗?
 但是，这两种句型所表达的意思是不同的。在Do(Would) you mind+V-ing结构中，V-ing的逻辑主语是you。也就是说，这个句型所表达的意思是“请你做某事”：
 1. Do(Would) you mind shutting the door? ——certainly not. (NAECD)
 对不起，请你关上门好吗?——当然好。
 2. Do you mind posting a letter for me? (Mansfield)
 请你给我邮封信好吗?
 3. Would you mind not smoking? (Please don't smoke.)(PEG)
 请不要吸烟好吗?
 如果V-ing的动作不是由you发出的，则必须在V-ing之前加上名词所有格(属格)或代词所有格(物主代词)：
 Do you mind my opening the window?
 我打开窗户，你不介意吧?
 Do you mind if I...句型则是表示“我做某事，你是否介意”。
 Do you mind if I stay here? (EED)
 我留在这里，你不介意吧?
 现在回过头来解答你提出的托福题。从听话人的回答：“Go ahead，I don't mind.” (“请吧，我不介意”)可以看出，问话人并不是“请听话人做某事”，而是询问听话人是否介意说话人做某事。因此，理所当然地应当选C(if I open the window)。下面的托福题是更有力的证明：
 1. Would you mind helping me with this load of books?
 A. Please remind me to read this book.
 B. Could you help me carry these books?
 C. I don't mind if you help me.
 D. Do you have a heavy course load this term? (TOEFL，86. 5)
 2. “Is George really leaving the university? “ “ Yes，but would you mind________to anyone?”
 A. not mentioning it B. not to mention it
 C. not mention it D. not to mentioning it(TOEFI，74.9)
 3. Would you mind________ your radio a little，please?
 A. turn off B. turning off
 C. to turn down D. turning down(全国高考英语试题，1982)