I'm reading about the correct usage of wish-constructions, and my English grammar book says:"Would + infinitive may be found in the subordinate clause only if the subjects in the clauses are different. It makes the wish more emphatic. The use of "would + infinitive" often implies that you want a situation to change and you talk about things that annoy you". As an illustrative example the book gives this:
I wish it would stop raining. It rains all the time.
But I have several questions regarding it.
The book says that "would" in wish-constructions is put in subordinate clauses if a person is annoyed by something. However, it writes "often implies" but not "always implies". So I'd like to know if "would" can be used in wish-constructions when a person isn't annoyed.
Also, I'm puzzled with the second sentence of the example( "It rains all the time"). They first wrote about annoyance, but put a form of Present Simple. Wouldn't it be more logical if they wrote the second sentence in emotional Present Continuous instead of Present Simple ("It's raining all the time), so that it can express a stronger emotion?
Finally, I would like to clear up another thing. What if I ommit "would" and formulate the sentence in a different way: "I wish it stopped raining."Will it be correct from the point of view of grammar?