An episode about English phrases that are difficult for Japanese students to grasp. "in" and "on" are two words which native English speakers never get confused when to use. However, it is difficult for Japanese students to use them at the appropriate times. Is it "stay in line" or "stay on line?" In time or on time? How about combinations of "on + to" and "in+to?" If you are an English speaker, how would you explain this to English learners?