was passed和has passed的区别?

was passed和has passed的区别? she was very ------(luckily) .she has passed the exam. Three months __ since he __ hereA have passed;leftB has passed;leftC has past;has leftD has passed;was away ten years have passed还是has passed 2 years has passed还是have passed What has passed is past . she is one of the few girls who ____ passed the examination.A.was B.were C.has D have 关于imparfait,plus que parfait,passe compose和passe simple这些都是过去式,可是什么时候能用哪些呢? 几道英语方面的题,帮下忙啊1.He is the only student who ( )the exam.A.have passed B.has passed C.had passed D.has been passed 2.You find it ( )useful to learn even a little englishA.it B.it was C.that D.this3.Can you tell me ( A.who is he B Many years has passed since the big fire __the city chicagoA，was destorying B,damaged C,was burned D,would attrack理由 six years__since she left chengdu.A has passed B had passed C passed “Day has passed.Another day again 时间过得太快,一周又要过去了--英语怎么说passed again和has passed这时态不对吧，这句话应该是什么时态？是应该用passed还是past 一定要说明理由 Five years _____since he died.A.have passed B.has passed C.is passed D.are passed He said he ____Harry Potter plenty of times and was still excited about itA.has seen B.had seen C.sawI'd like to tell you that you _____the examA.have passed B.pass C.had passed was是什么意思?have和has是什么意思? Another few days passed .I was lonely . 1.Both Tom and Mary_the exam.为什么选have passed?2.The factory,including its machines,_burnt last night.为什么选的是was不是has been?