In Verbs^x, Negations^x, Expressions^x

I imagine that, even if you confine it to appearance expressions, you're going to run into trouble with when to use have and when to use has . Secondly, there's going to be a fuss over the question forms do ... have and does ... have . Then there's going to be a stumbling block with negations...

Hi I would like to know more about the use of "since" and "for" with the Present Perfect Simple. I have found that these expressions are mainly used in the Present Perfect Simple in order to show a continuous situation, (especially with stative verbs that most of the time are used only in...

i am confused in whether add "to" or not sometimes,we say : go to bed,go to cinema,go to party,go to school..there are more expression as it,why donot add "to"in that sentence when we say "go there"?tell me the reason pls? other question?it is a past tense in this sentence,also,it is a...