分钟大于30时用TO
分钟小于30时用PAST
如
9:50 ten to ten
10:10 ten past ten
4:05 five past four
4:35 twenty-five to five
分钟大于30时用to分钟小于或等于30时用past如9:50 ten to ten 10:10 ten past ten 4:05 five past four5:30 half past five 4:35 twenty-five to five