六点十五分用英语怎么说三种

6:15 - This is the most common and straightforward way to say 6:15 in English. It is the 24-hour time format and widely used in many English-speaking countries.
Example: "The train leaves at 6:15 PM."
Translation: "火车6点15分离开。"

Six fifteen - This is another way to say 6:15 in English using the 12-hour time format.
Example: "I'll meet you at six fifteen PM."
Translation: "我会在下午六点十五分见到你。"

Quarter past six - This is a way to say 6:15 in English using the time expression.
Example: "The movie starts at quarter past six PM."
Translation: "电影在下午六点过去十五分开始。"

Note: The use of "AM" and "PM" is based on the 12-hour time format and they stand for "ante meridiem" and "post meridiem" respectively, which means before noon and after noon.