twenty past seven =seven twenty
half past ten or half to eleven =ten thirty
a quarter past twelve=twelve fifteen
two to two =one fifty-eight
a quarter to four=three forty-five.
过用past表示,差,不够用to表示.顺读就直接读数字即可.有问题再问.上面哪个是顺读法，哪个是逆读法等号左边是逆读法，右边是顺读法