In English we often use "I wish" to talk about imaginary situations in the present. We usually use it to talk about the opposite of what is true or real.
In English we use wish + past simple to make wishes about states.
In English we use wish + past continuous to make wishes about activities happening now or in the future.
Form : ( Wish + could + infinitive (verb 1) )
In English we use wish + could + infinitive to make wishes about abilities or possibilities.
In English we use wish + didn't have to + infinitive to make wishes about obligations.
In English we use wish + would + infinitive to make wishes about things that we would like to change. This is often used to show annoyance or frustration about things outside our control.
We often use wish + Past Perfect Simple to make wishes about the past. These wishes are used to express regret about something that happened.
We can also use should/shouldn't have + past participle to express regret about something in the past.
To simply express that you want something to happen in the future we use hope, not wish. We use I hope... to talk about things that we think might happen in the future. I hope... is followed by a clause.
Notice the difference between I wish... and I hope... in these sentences:
Notes for use of "I wish" :
In English we can say I wish I/he/she/it was... or I wish I/he/she/it were... eg. I wish I was younger.= I wish I were younger
We can use "If only..." instead of "I wish..."
After wish constructions we often add a clause with but + subject + auxiliary verb