8点45、7点45、9点半用英文写出来

A quarter to Nine; Eight Forty-Five
A quarter to Eight; Seven Forty-Five
Nine Thirty; Half past Nine

At eight o 'clock and forty-five
At seven o 'clock and forty-five
At nine o 'clock

最地道的：eight forty-five、seven forty-five、nine thrity

eight past forty-five
seven past forty-five
half past nine

a quarter to nine
a quarter to eight
nine o'clock and a half