学习必备欢迎下载还没现在完成时的讲解和练习对所学时态的回顾，引入现在完成时通过数轴来概括讲解所学的四个时态：一般现在时、 现在进行时、 一般过去时、 一般将来时。（导入）有时候，这4 种时态还不能满足我们表达的需要。比如：表示“某人过去曾经做过某事”或者“某人做某事多久”，以上五种时态就派不上用场了。这时，我们可以用一种新的时态——现在完成时表示。同样也用数轴来表示一下。一 现在完成时的构成:主语+ have/has + 过去分词(过去分词 :规则动词的过去分词构成与动词过去式相同;不规则动词需要特殊记忆。－略) [Exercises1] 选择填空( )1.I Enghish in this school since 1999 (A)taught (B)have taught (C)tea (D)would teach ( )2.Lilei the pen for five years (A)has had (B)bought (C)have had (D)have bought ( )3.Kate her grand mother's photo before (A)haven't seen (B)have seen (C)see (D)hasn't seen ( )4. Mary you these days. (A)Has,seen (B)Do,see (C)Did,see (D)Is,seeing ( )5.so far ,we thousands of Building in Quanzhou (A)build (B)have build (C)build (D)will build 二、否定式 :主语+ haven’t/hasn’t + 过去分词。疑问式 : Have /Has + 主语+ 过去分词 ? 简略答语 : Yes, 主语 + have/has.(肯定 ) No, 主语 + haven’t/hasn’t.(否定 ) [Exercises2] 选择填空( )1.— Have you finished your work? —. (A).Yes,I have. (B)Yes,I do. (C)Yes,I am. (D)Yes,I did. ( )2.— Has she ever learned English? —(A)Yes, she has. (B)Yes, she does. (C)No, she doesn’t (D)No, she has ( )3.He finished his homework. yet 学习必备欢迎下载(A)doesn’t (B)haven’t (C)hasn’t (D)doesn’t have 三 现在完成时的含义之一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，常与never/ever， just， already/yet，before。so far 等连用。这些标志词可以表达这种含义⑴以 already, just 和 yet 为标志already, just 和 yet 表示到现在为止动作或状态已经、刚刚或还没有发生 。He has already got her help. He has just seen the film. He hasn’t come back yet。⑵以 ever 和 never 为标志ever...
