This paper is to be understood as one of a series of inquiries into the problems possible met by Japanese students in learning English, with special regard to what influences their mother tongue will exert on their study, on the assumption that the knowledge of a language already obtained might cause some or other conflicts in their new efforts to acquire a second language. This paper aims at guessing the possible conflicts created by the similarities and differences between Japanese and English, limiting the discussion to the case of learning English interrogative expressions. The items to be considered will be as follows : - 1. Logic of Interrogative Expressions 2. Forms of English Interrogative Expressions 3. Forms of Japanese Interrogative Expressions 4. Yes-No Questions 5. Alternative Questions 6. Tag-Questions 7. X Questions 8. Indirect Questions 9. Pseudo Questions 10. Double Questions, Incomplete Questions, etc. 11. Verificatio
