新目标八年级英语下unit现在完成时.pptx

会计学;一般过去时与现在完成时之比较;1. 现在完成时表示过去发生或已经完成的动作对现在造成的影响或结果。(汉语中常用“已经”、“过”、“了”等表达）通常与表示包括现在在内的时间副词 just，already, before, yet, never, ever 等状语连用。例如： ① I have never heard of that before. ② Have you ever ridden a horse? ③ She has already finished the work. ④ Have you milked the cow yet? Yes, I have done that already. ⑤ I’ve just lost my math book. ;2. 现在完成时可表示过去某一时间开始并一直持续到现在（包括“现在”在内）的动作或状态，可以和表示延续的时间状语连用。 如for、since 等引导的时间状语。（注意：句中谓语动词要用延续性动词。如：know, be, see, live, study, work, teach……）; ;请大家认真分析比较下列各例句：;现在完成时与瞬间动词;以上三种表示方法适用于所有瞬间动词。;2.转换成be+名词 join the army join the Party go to school ;4.转换成 be+介词短语 go to school join the army;③ 自从上星期以来,我就借了这本书.;;现在完成时“三看三用”;－Have you had your breakfast? －Yes, I have. －When did you have it? －At seven thirty.;1b;;Listen again and circle T or F.;Listen again and circle T or F.;Listen again and circle T or F.;;Exercise: 用给出词的正确时态填空。 1. I _____ ever _____ (be) to the Great Wall. 2. She ____ never _____ (be) to a water park. 3. We _____________ (not be) to a space museum. 4. Tina _____________ (not be) to Singapore. 5.-- _____ you ever _____ (be) to a zoo? --Yes, I _____. I _____ (go) there last month. -- So _____ I. 6. -- _____ Linda ever _____ (be) to an aquarium? --No, she ______. She __________ (not go) there last week. -- Neither _____ I. 7. He ___________ (go) to England, he is not here. ;Exercises;( )5. –Where is Han Mei now? － She ____ to Shanghai. She will be back in two days. A. has gone B. has been C. goes D. had gone ( )6. －_____ you ____to the United Stated ? － No, never,but I went to Canada a few years ago A. Have; been B. Have; gone C. Did; go D. Do; go;( )9. —Where have you _____ these days? —I have _____ to Kunming with my friends. A been , gone B been , been C gone , been D gone, gone ( )10. How long have you ____ this book? A. bought B. borrowed C. had