#WishTense

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Uses

We can use 'wish' to talk about something that we would like to be different in the present or the future. It's used for things which are impossible or very unlikely. 

We also use 'wish' with 'could' to talk about things in the present or future that we would like to be different. In this situation, 'could' is the past simple of 'can'. 

Try this exercise: http://www.perfect-english-grammar.com/wish-exercise-1.html

We don't usually use 'wish' in this way for things that are really possible in the future. Instead, we use 'hope'

Wish + (that) + would:

On the other hand, we use 'would' with 'wish' in a little bit of a special way. It's generally used about other people who are doing (or not doing) something that we don't like and we want that person to change. It's not usually used about ourselves, or about something which nobody can change though, exceptionally, we do use it about the weather. 

We don't usually use 'would' when there's no feeling that we want somebody to change their behaviour. 

Wish + (that) + past perfect

We can use 'wish' with the past perfect to talk about regrets from the past. These are things that have already happened but we wish they'd happened in a different way. This use of 'wish' is very similar to the third conditional. 

Wish + to + infinitive

We can use 'wish' with the infinitive to mean 'would like'. This is very formal. We don't usually use a continuous tense with 'wish' in this case. 

Wish + object + to + infinitive

In the same way, we can use 'wish' with an object and an infinitive. 

Wish + somebody + something:

This is used mostly in set phrases. 

Here is even more practice for you: http://www.grammar-quizzes.com/condition4a.html