`text(6. Had asked)`

↔ `text(Form: S + wish + S + had + ed/V3)`

`text(7. Hadn't stayed)`

↔ `text(Form: S + wish + S + had + ed/V3)`

`text(8. Hadn't bought)`

↔ `text(Form: S + wish + S + had + ed/V3)`

`text(9. Hadn't seen)`

↔ `text(Form: S + wish + S + had + ed/V3)`

`text(10. Hadn't called)`

↔ `text(Form: S + wish + S + had + ed/V3)`

`.` `.` `.` `.` `.` `.` `.` `.` `.` `.` `.` `.` `.` `.` `.` `.` `.` `.` `.` `.` `.` `.` `.` `.` 

`text(@huythanhle)`

6. I wish I (ask)  had asked him how to get there.

  S + wish(es) + S + had + V3/-ed

7. I wish I ( not/stay) wouldn't stay at home.

    S + wish(es) + S + wouldn’t + V1

8. I wish I (not/buy) hadn't bought that book.

S + wish(es) + S + hadn’t + V3/-ed = IF ONLY + S + V ( P2)

9. I wish I (not/see) hadn't seen him.

S + wish(es) + S + hadn’t + V3/-ed = IF ONLY + S + V ( P2)

10. I wish I (not/call) hadn't called him a liar.

S + wish(es) + S + hadn’t + V3/-ed = IF ONLY + S + V ( P2)