Opinion attention
- A=every body may i have your attention please?
  B= yes ma'am
  A= we will use english in our english class
  B= yes ma'am
  A=do you understand what did i say siti ?
  B= yes ma'am

opinion understand

A=do you understand of what did she said
B=yes < she said that we should speak english in our class

maaf klo salah ;-}