Friday, March 22, 2013

Thêm Will, have+pp, be+ing và S hoặc Ed để làm rỏ thì giờ.


                 How                       are   you?
             How                       were   you?
         How                       are   you doing?
         How               have  you   been doing       
         How will you have been  doing?
         How will youhave been  doing?
              Hes   been       singing.
              Hes                  singing.
              He                     sings.
              He‘ll                  sing.
              He                     sangs.
                      Hes   been        sunging.             

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