I need your help.I don't know if those sentences are correct(my grammar book says they are):
We had a heatwave last week. heatwave is a count noun
(but natural phenomena should be uncountable)
I had such a bad headache.(again) again, headache is a count noun
I need a rest.(it sounds ok but...) this can be either a count or non-count noun
And one more thing:
A:I wish Mark....(stop) playing his music so loudly.
B:Why don't you ask him to turn it down?
Why 'I wish he stopped' is not correct?He may be playing his music at the moment of speaking.
A:If only it....(stop)raining.
B:Yes.Then we could go for a walk.
Again 'stopped' is not correct. It's because you want somebody or something to change, but actually you can't do anything about it; it's more of a request rather than a statement of facts
I simply don't know why I can't use past simple in this case(the structure is used when we want to say that we would like something to be different in the present.I think that both 'would'(used to express our desire for a change in a situation or someone's behaviour) and 'stopped' should be correct.
Thanks in advance