Studу the information about sentences with words "I wish" and "If only".

Words 'wish' and 'if only' are used to express a wish.

1. Use wish/ if only + past simple for the present when you want to say that we would like something to be different.

I wish/ if only I had a lot of friends. (But I don’t have a lot of friends.)

Рис. $$1$$. Friends

2. Use wish/ if only + Past Perfect  when you want to express regret that something happened or did not happen in the past.

If I had come  to my relatives last week. (I did not come to my relatives)

3. Use wish/ if only or a polite imperative or when you want to express your wish for a change in a situation.

I wish she would put her things away.

I wish it would stop  snowing.

Рис. $$2$$. Snowfall
After pronouns we and I use could instead of would.
I wish I could support  you.
Atsauce:
Рис. 1. Friends, 2017, https://pixabay.com/images/id-2567915/ Pixabay License CC0 Free for commercial use No attribution required
Рис. 2. Snowfall, 2013, https://pixabay.com/images/id-201496/ Pixabay License CC0 Free for commercial use No attribution required