6,I am not good at English.

→ I wish I were good at English.

7,He studies badly.

→ I wish he studied well.

8,He doesn’t like playing sports.

→ I wish he liked playing sports.

9,I don’t have a computer.

→ I wish I had a computer.

10,Today isn’t a holiday.

→ I wish today were a holiday.

Giải thích :

+)S + wish(es) + S + V (quá khứ đơn)

+)S + wish(es) + S + had + V3/ed

+)S + wish(es) + S + would/could + V (nguyên thể)