Befor用法.ppt

Before用法 a.没来得及….就…. 1．Someone?called?me?up?in?the?middle of?the?night?,?but?they?hung?up?__________I? could?answer?the?phone.A．as?B．sinceC．until?D．Before(2000全国高考） 2.The roof fell before he had time to dash into the room to save his baby. 3.To my great disappointment,my favorite singer left the concert before I could have a word with her. b.过了多久…才，动作进行到…程度才 They walked about thirty miles to the west before they saw a village. They worked day and night about three days Before everything returned to normal. c.It was(wasn’t)+时间段+before….一般过去时 it will(won’t) be+时间段+before+一般现在时 时态代替现象 变异： It took me a long time before+一般过去时 it may/could/can/must be+一段时间+before… It was not long before he sensed the danger of the position. It will be half a year before you graduate from this school. 1.--How soon can you finish the large picture? ---It will be two months____. A.after I finish it B.before I will finish it C.before it is finished D.since it has been finished 2.It will be a week____I finish reading this novel. A.since B.before C.that D.when 3.____he returns to his hometown. A.It is long before that B.It is before long after C.It will be before long that D.It won’t be long before 4.—It’s a long time___I saw you last. ---Yes,and it will be a long time____ we meet again. A.that,until B.since,before C.when,that D.before,since 5.It will be a long time____everything returns to _____. A.before,normal B.since,normally C.before,usual D.since,normal 6.It was some time____we realized the truth. A.when B.until C.since D.before(05 7. several weeks had gone by _______I realized the painting was missing.(04全国4） A. as B. before C. since D. when 7.The American civil war lasted four years____ the North won in the end. A.after B.before C.when D.then 8.Some scientists say that it may be five or six years____it is possible to test this medicine on human patients.(04福建） A.before B.since C.after D.when 9.It wa