Prepositions of Time                                                                                                                   

•  at -   I will work at 6 P.M.                                 at   +  a specific time     
•  at -   They eat   at night.                                 at   +  night
  
• 
  
•  in -   We work in the evening                            in   +  the evening
  
•  in -   You play soccer in the afternoon.               in   +  the afternoon
  
•  in -   Ed has a meeting in the morning.               in   +  the morning
  
•  in -   My mom was born in 1950.                        in   +  specific year
•  in -   His birthday is in June.                             in   +  specific month
  
• 
  
•  on  - Fred shops on every Saturday.                   on  +  a specific day of the week
  
•  on  - Janet was elected Mayor on March 2, 2008. on   +  a specific date
  
• 
  
• from...to  I have work from 1 A.M. to 5 P.M..  from (a specific time) to ( a specific time)
  
• 
  
• after - I will be there after work.
  
• around - We will be there around 3 PM
• before - I will be there before I go to school.
• between - I will be there between 4 and 5.
  
• by - I will be there by the time that you leave for work.
• during - I will be there during your class.
• for - I will be there for your birthday.
• past - I wasn't there for the past 2 months.
• since - I didn't see her since I was 10 years old.
• until - I will not be home until 7:00 PM.
• within - I will be there within 2 hours.

Example #2 
Present Simple:            What time   does   Mark    play pool?              At 3:30 P.M.                                           When         does   Mark    play pool?              At 3:30 P.M.

                           What time  do       they    play pool?               At 6:30 P.M.
                            When         do      they    play pool?               At 6:30 P.M.

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