References: Le, Quang Thiem. (2004). Ngôn ngữ học đối chiếu. Hanoi: Hanoi National Unive Publisher. Wikipedia, the free encyclopedia. (2009). Question. Retrieved December 27th, 2009 from http://en.wikipedia.org/wiki/Question Wikipedia, the free encyclopedia. (2009). So sanh doi chieu cau hoi giua tieng Anh va tieng Viet. Retrieved December 20th, 2009 from www.tckt.edu.vn/uploads/noisan/47/J-Dao-R-24-27.doc WhiteSmoke. (2008). Negative Sentences and Questions in English: The rules for forming negative and interrogative sentences using auxiliary verbs in English. Retrieved December 25th, 2009 from http://www. Negative Sentences and Question Formation in English.htm Wikipedia, the free encyclopedia. (2009). Learning to Question. Retrieved December 27th, 2009 from http://www.fno.org/qwl/intro.html
References: Le, Quang Thiem. (2004). Ngôn ngữ học đối chiếu. Hanoi: Hanoi National Unive Publisher. Wikipedia, the free encyclopedia. (2009). Question. Retrieved December 27th, 2009 from http://en.wikipedia.org/wiki/Question Wikipedia, the free encyclopedia. (2009). So sanh doi chieu cau hoi giua tieng Anh va tieng Viet. Retrieved December 20th, 2009 from www.tckt.edu.vn/uploads/noisan/47/J-Dao-R-24-27.doc WhiteSmoke. (2008). Negative Sentences and Questions in English: The rules for forming negative and interrogative sentences using auxiliary verbs in English. Retrieved December 25th, 2009 from http://www. Negative Sentences and Question Formation in English.htm Wikipedia, the free encyclopedia. (2009). Learning to Question. Retrieved December 27th, 2009 from http://www.fno.org/qwl/intro.html