2 thì hiện tại đơn:
      Câu khẳng định: I often play football before go to school
                                 he usually plays volleyball alone
      Câu phủ định: We don't swim
                             Tom doesn't do his home
      Câu hỏi: does she play badminton?
                    do they watch TV?
3 quá khứ đơn:
       Câu khẳng định: They visited Phong last night
                                  Linda was at home
       Câu phủ định: He didn't go to the zoo last week
                              we didn't play volleyball yesterday
       Câu hỏi: Did she play football?
                      did you bring her the package?