Hi. I'm really confused of using verb after the word "before/after" Something does makes sanse if I think in Korean grammer...but in English Ive noticed that there is a little bit of difference in grammer. Can I say(Question1) =>I will never know that before I arrive there... or I will never know that before I will arrive there. =>What is going to be the most important thing after the class starts or /the class will be started ? =>What was your occupation before you ve immigrated to this country   or What had you been doing before you immigrated to this country? My English grammer is really weak and it's really difficult to have a conversation with friends with my grammer... I don't feel familiar with using English expressions. Even though I don't know about subtle difference of words that have almost same meaning. And also, as I asked the questions, I don't use the English tense well , and sometimes I'm so confused between korean tense using and the English one. Question2)Please let me know how can I get the knack of use English language fluently. something like know-how. Question3) in English language, is verb tense used just according to when they ve done or is supposed to do, no matter where was it put in a sentence?  (regardless of the word after or before?) for example : I ll visite Japan after I will graduate from University. (It will be done in the future, but it's going to be done after I ve graduated( I mean at that time, I'm not "will graduate" I "graduated") so Can I write " I ll visite Japan after I graduated from University?" which one is right? Thank you for reading. Please answer my qeustions