Unit 8 Have you read Treasure Island yet?现在完成时（无答案）一2023-2024学年人教版英语八年级下册

现在完成时一
名字 一．定义（1）表示过去发生或已经发生的动作对现在造成的影响或结果,这个影响和结果对现在还必须存在.常与already(已经), yet(已经,还), just(刚刚),ever(曾经)，never, since(自从) ever since（从那时到现在） （标志词特征）
so far（到目前为止） up to now（直到现在）, the past few years(过去的几年)等词连用.
already: 常用于肯定句（均表示：________）.
yet: 常用于否定句(表示：___________),疑问句末尾（表示：_______）
I have had breakfast.(我已经吃过早饭了。) 我现在不饿。
定义：(2)现在完成时表示从过去开始一直持续到现在还有可能继续持续下去的动作或状态。常与for, since引导的时间短语或从句连用. for+表示一段时间的词组； since+过去某一时间点的词组或一般过去式的句子.
eg: She has learned English for 5 years（她已经学习五年英语了）She has learned English since 5 years ago.
解释：一直在学，持续了五年，并且还可能持续学下去.
([Exercisese1] A）用since和for填空
1)) ______ two years 2) _______ two years ago 3) _______ last month 4) ______ 1999
5) _______ yesterday 6) _______ 4 o’clock 7) ______ 4 hours
8) _______ an hour ago 9) _______ we were children 10) _____ lunch time
1. He has lived in Nanjing ____ the year before last. 2.I’ve known him ____ we were children.
3. It’s about ten years __________ she left the city.
( )1.I've been like this ever since _________
(A)last week (B) for a week (C) a week before (D)the last week
( )2.My mother has worked in this factory _____2 years.
about (B)for (C)in (D)since
3.I have already had dinner. （否定） I _______ _______ dinner _______.
4.I have already had dinner. （提问） _______ _______ ________ _________ _______
5.Susan has learned English at school. （提问 _______ _______ ________ ________ _______
二 结构： （骨相）
=
标志词：（特征）
和同伴的区别
二． 现在完成时与一般过去时的区别：过去时标志词如yesterday,last night, three weeks ago, in 1990等.
现在完成时标志词 already(已经), yet(已经,还), just(刚刚),ever(曾经)，never, since(自从) ever since（从那时到现在） so far（到目前为止） up to now（直到现在）, the past few years(过去的几年)等词连用
一般过去时只表示过去的动作或状态，和现在不发生关系。一般过去时就可以和与表示过去的时间状语连用.
He has lived here since 1993. (现在完成时，后面有since引导的时间状语从句)
He lived here in 1993. （一般过去时，1993年住在这儿，现在没住在这儿了）
五、过去分词（长相）
练习：1. Mr. Chen _________(give)up smoking last year..
2. When _______ you ______(do) it We _______(do) it an hour ago.
3. ______ he ______(see) this film yet Yes. he ____ 4. When _____ he _____(see) it He______ it last week.
5. I _______ (read) the novel twice. It’s interesting.
6. —How long have you stayed in this city —I’ve lived here ________ eight years ago. A．for B．as C．since D. already
16．—Mr. Black has been in China _____ 2002. —So he has been in China _____ 10 years.A．since; since B．for; since C．since; for D．for; for