十点半用英语怎么说

"How to say 'ten thirty' in English" is the question you asked.

In English, "ten thirty" can be expressed as "10:30". This is because we typically use a two-digit hour (with leading zeros for less than 10) and then a colon to separate it from the minute (also with leading zeros for less than 10). So, "ten thirty" in written form would be "10:30".