1.It's a pity that my father has to work on the weekends.
=>I wish
2.I'm sory you don't understand the instructions clearly
=>I wish
3.Nga said to me,"I am going to meet my sister in front of the bus-stop tomorrow
=>Nga
4.Did the students start writing to each other three years ago?
=>The students started writing to each other three
1.It's a pity that my father has to work on the weekends.
⇒I wish my father didn't have to work on the weekends.
2.I'm sory you don't understand the instructions clearly
⇒I wish understand the instructions clearly
3. Nga said to me,''I am going to meet my sister in front of the bus-stop tomorrow
⇒Nga told me that''I will meet my sister before the bus -stop''
4.Did the students star writing to each other three years ago?
⇒The sudents started writing to each other for three years
1.It's a pity that my father has to work on the weekends.
=>I wish my father didn't have to work on the weekends
2.I'm sory you don't understand the instructions clearly
=>I wish you understood the instruction clearly
3.Nga said to me,"I am going to meet my sister in front of the bus-stop tomorrow
=>Nga said she was going to meet her sister in front of the bus-stop the following day
4.Did the students start writing to each other three years ago?
=>The students started writing to each other three years ago, didn't they?