To express these times in English, you would write them as follows:
8:10 am = eight ten in the morning
8:20 am = eight twenty in the morning
8:30 am = eight thirty in the morning
8:40 am = eight forty in the morning
8:45 am = eight forty-five in the morning
4:00 pm = four o'clock in the afternoon
7:00 pm = seven o'clock in the evening
7:30 pm = seven thirty in the evening
8:00 pm = eight o'clock in the evening
9:00 pm = nine o'clock in the evening
Remember to use "am" for times in the morning and "pm" for times in the afternoon and evening. Use the words "o'clock" for times that are on the hour and "thirty" for times that are half past the hour.