I wish and if only

My boss is always shouting at me. Can I say tell:

1) I wish he would stop shouting at me and I could concentrate on my work.

2) I wish he wasn't weren't always shouting at me and I could concentrate on my work.

3) If only he'd stoped shouting at me I could concentrate on my work.

4) If only he wasn't weren't always shouting at me I could concentrate on my work.

Are there any mistakes there? Is there any difference in meanings?

I believe that Vera's use of the word "weren't" in sentences 2 and 4 is correct.  "Weren't" is an example of the "subjunctive" mood in English. 

2) I wish he weren't always shouting at me, and I could concentrate on my work.  [Better: .... so I could concentrate on my work.]

4) If only he weren't always shouting at me, I could concentrate on my work.

Here is a good bilingual discussion of the subjunctive mood in English related to "wishing":

http://usefulenglish.ru/grammar/constructions-with-wish

There are many other useful bilingual discussions about English grammar on that website.

Also, here is a correct variant of Vera's sentence 3:

3) If only he stopped shouting at me, I could concentrate on my work.