英语完成时的构成完成时的用法要点解读 完成时的构成 现在完成时由“have/has＋过去分词”构成；过去完成时由“had＋过去分词”构成。 常使用完成时的句型 (1)This/It/That is the first/...time＋that sb.has/have done； This/It/That was the first/...time＋that sb.had done sth.这是某人第几次做某事 It was the third time(that)he had made the same mistake. 那是他第三次犯同样的错误了。 (2)It(This)is/was the＋最高级＋名词＋(that)定语从句，从句中的谓语用完成时。 (3)It is/has been＋一段时间＋since sb.did； It was/had been＋一段时间＋since sb.had done sth.自从……以来多久了 (4)hardly(scarcely)...when.../no sooner...than...(一……就……)主句用过去完成时，从句用一般过去时。 Hardly/No sooner had I got  home when/than the rain poured down. 我一到家，就下起了倾盆大雨。 沪江英语网校 新概念英语青少版2b 新概念英语什么水平 Ⅰ.单句语法填空 1．(2020·井冈山二模)Just as I got to the school gate, I realized I had left (leave) my book in the cafe. 2．(2020·滨州模拟)Either the beautiful sights of this modern city or its local custom has attracted(attract) thousands of visitors during the past years. 3．(2020·浙江金华十校模拟)Doctors and scientists have learned(learn) a great deal about sleep in the last thirty years. Ⅱ.单句改错 4．(2020·郑州押题卷)They said never before have they experienced so interesting a class. have→had 5．(2020·山东省部分重点中学第一次调研)Tired of sleeping on the floor, a young man in Teheran bought a real bed.It was the first time that he has become the proud owner of a bed. has→had 题： Who do you suppose _____ the pen yesterday ?  A. took away           B. to take away       C. taking away          D. had taken away How do you guess_____ they_____ so much money? A. did; get     B. /;got      C. had; got     D. /;get He made another wonderful discovery, _____ of great importance to science.  A. which I think is        B. which I think it  is  C. which I think it        D. I think which is 答案： A ；B；A 解析：考查混合疑问句中宾语从句的动词形式。混合疑问句的句式：特殊疑问词+插入语do you think(或其他表示心理活动的词)+陈述语序？注意：特殊疑问词+陈述语序构成宾语从句。空格处为宾语从句的谓语动词，A和B是非谓语动词，所以排除；根据时间状语yesterday可知，从句谓语动词应用一般过去时。 解析：考查混合疑问的语序和时态。混合疑问句的句式：特殊疑问词+插入语do you think(或其他表示心理活动的词)+陈述语序？注意：特殊疑问词+陈述语序构成宾语从句。根据这个句式的结构可知，排除A 和C；根据语境可知，“得到”的动作发生在过去的某个时候，所以应用一般过去时。 解析：考查定语从句的引导词。_____ of great importance to science是定语从句，其现行词为another wonderful discovery。I think为插入语，应放在引导词之后。把I think去掉之后，就很明显地看出从句为主系表结构，其中another wonderful discovery为主语，is of great importance to science为系表结构作谓语，所以引导词应为which。因为which已经替代了先行词another wonderful discovery，所以it就属于多余的词了。故答案为A。