I seem to remember (back in the day) being taught sentences must have an object and an action and that the shortest possible was something like "do it.". Can someone please formalise this and explain whether simply "no." is valid?

What is the difference between the following two: I didn't know if this community exist I didn't know if this community was here

I'm always confused how to write a "something of something else" in English, especially when plural is involved. For example, what would be the correct way to write the following sentences in English: There are three phones, each phone is of a different type: Three types of phones? Three phone...

The answer is best approximated as "yes", although there are some strictly non-context free components of English. The approximation of saying "English grammar is context free" is more true than false, in that the vast majority of the sentences you will encounter will be parsable by a simple EBNF...

the difference between covered in blood and covered with blood

I run into the following sitatution: If he had bothered Mike, he would have bothered him back so much that he would have forgotten about bothering anyone in his life again. Is 'would have' the correct format for the part in bold? Can we use other tenses in the same context?

Iam doing a research about the difference in meaning between covered by, covered in, and covered with: for example: what is the difference between: covered with blood covered in blood the mountain was covered in snow or

Future tense is certainly used to express events that are going to happen, but you can say "The next century begins in 2101". Notice that this is only because you are treating it as a measurable quantity; you could, in theory, say ?This century begins in 2001 and ends in 2100, though it sounds o...