1.She said to me:" i can't help you now?"
=> she told that she couldn't help me then
2.They said to her:"where đi you go last night?"
they told where had you gone the night before
3.He said to Mary"which class are you in?"
=> he told to mary which class she was in
4.He said to me"Sit down, please"
=> he told me to sit down
5.They said"we are learning E. now"
they told they were learning E. then
6.He said to her"iam thin now"
he told her that he was then then