1. 点钟数+分钟数 6: 10 six ten 7: 25 seven twenty-five

2. 分钟数+past +点钟数(分钟数不超过30分) 6: 15 a quarter past six 7: 20 twenty past seven 8: 30 half past eight

3. 差分钟数 + to +下一点钟数 (分钟数超过30分) 8:45 a quarter to nine 9: 50 ten to ten