Is it normal to say: "If it were to happen, it would already have(or had?) happened" I'm just trying to use it when someone is disappointed about something that he was hoping to happen but it hasn't, and he thinks it will never happen. Is the sentence correct in this situation? please suggest better sentences if you have any. thanks.

Is this correct? "I have decided to seek revenge from everyone"

which one is correct? Absolutely wrong or consistently wrong? The occasional mistake doesn't matter, but if you get it absolutely wrong, you're in trouble. or The occasional mistake doesn't matter, but if you get it consistently wrong, you're in trouble.

numbers+nouns There are some nouns that when we use them after numbers (more than one) they sometimes don't take a plural (s). For example in some cases we say "Five month" but I've also seen "Five months". What is the difference?