8:30 4:15 9:10 11:50 7:45 5:50这些用英语怎么表示啊?

8:30 eight thirty/half past eight
4:15 four fifteen/a quarter past four
9:10 nine ten
11:50 eleven fifty/ten to twelve
7:45 seven forty-five/a quarter to eight
5:50 five fifty/ten to six