Question

Ex1:
1) I don't have a computer at home --> I wish...
2) My sister has little time to look after her fsmily -> my sister wishes
3) Oh,no. He doesn't know how to control this machine --> He wishes
4) She can't join my party this evening --> I wish... 
5)My students can’t communicate in English --> I wish...

Answer 1

I wish I had a computer at home

My sister wishes she had lots of time to look after her family.

I wish she could join my party this evening.

I wish my students could communicate in E.

Answer 2

1- I wish I had...

2- My sister wishes she had

3- He wishes he knew

4- I wish she could

5- I wish my students could

Structure:

Present----> WISH + Past simple

Past ---->  WISH + Past perfect

Future ---> WISH + would + Verb (bare)