Как по 4: 10,7: 15,10: 20,12: 30,2: 45,4: 50

The ratio four to ten... остальное по аналогии

4.10 ...It's ten past four.
7.15....It's a quarter past six.
10.20... It'stwenty past ten.
12.30 ....It's half past twelwe.
2.45.... It's a quarter to three.
4.50.... It's ten to five.