十二点半和一点半分别用英语怎么说

twelve thirty; half past twelve
one thirty ; half past one

Half past twelve o'clock
half past one o'clock

half past twelve / one

12：30 half twelve 或者 twelve thirty 或者 half past twelve
1：30 half one 或者 one thirty 或者 half past one

十二点半
a half past twelve(要有不定冠词)
twelve thirty
一点半
a half past one
one thirty