7：40 forty minutes past seven（7点经过40分）

twenty minutes to eight （8点还差20分）

3:45 forty-five minutes past three

a quarter to four

5：30 half past five

half to six

9:40 forty minutes past nine

twenty minutes to ten

6:26 twenty-six past six

four minutes to half past six

8：00 eight o' clock

eight

10:20 twenty minutes past ten

ten minutes to half past ten

第一种最准确，第二种有点不太确定.