用英语表示下列时间

twelve o’clock
four o’clock
half past eleven
half past eight
half past one

twelve o'clock
four o'clock
eleven thirty/half past eleven
eight thirty/half past eight
one thirty/half past one

楼上说的没错，但是根据美语的口语习惯

绝对不会说half past...

而是说eight thirty,

否则美国人会觉得很奇怪。