7点45分用英语怎么说

"7:45" in English is typically expressed as "seven forty-five" or "seventeen forty-five" (if you are referring to 7:45 PM)。

来源：英语中表示时间的方式是通过读数字来表示小时，并用 "o'clock" 或 "hundred" 来表示分钟。例如，"7:00" 可以说作 "seven o'clock"，"7:15" 可以说作 "quarter past seven"，"7:30" 可以说作 "half past seven"，"7:45" 可以说作 "quarter to eight"。

例句：

"I have to be at work at seven forty-five."
"The movie starts at seventeen forty-five."
"I'll meet you at seven forty-five in the morning."

中文翻译：

"我必须在 7 点 45 分上班"
"电影在下午 5 点 45 分开始"
"我将在早上 7 点 45 分见你"