I studied here for four years and my daughter is studying here too为什么不用had studied

I studied here for four years and my daughter is studying here too为什么不用had studied I have lived here (for) five years. 这里的for为什么可以省略?I have studied English (for) five years. I am familiar _____ the city because I studied here for four years这题用for还是with?为什么? I told Sally how to get there,but maybe I ()for here.a.must have studied b.might studyc.should have studied d.would study I have studied English for three months. I hope you studied for this test! I studied French in Sichuan University for four years答案是studied怎么解释 I studied for the math test的意思 I have studied English for 7 years.同义句 I cleaned my room and studied for the math I studied for the test all day翻译成汉语 I hope you studied for this exam怎么理解? I would haver studied hard for the test I studied for the math test at home什I studied for the math test at home什么意思 By the time I graduate next year,I will have studied and lived here for 5 years.请问请问I graduate next year是什么成份?为什么不是By the time that I graduate next year. I have studied English or three years since I had come here.（改错） I have studied French since the day I came here.请问应该怎么翻译? I'm .here .just .for .