用英文分别写出7点15和8点半还有9点40的各两种形式

senen fifteen a quarter past seven
eight thirty half past eight
twenty to nine nine forty

seven fifteen /a quarter past seven；eight thirty/ half past eight； nine forty/ twenty to ten

7点15 seven fifteen,或 a quarter past seven
8点半 eight thirty,或half past eight
9点40 nine forty,或twenty to ten