初中现在完成时讲解ppt

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• I have read the book twice already.
• 在以上两种用法中常跟already, not…yet, never, just, before, ever, recently等
时间继续下去的状语。
• 3) 表示过去已经开始, 持续到现在, 也 许还会继续下去的动作或状态,常与包 括现在在内的一段时间的状语连用。
动词填空:
1._H_a__v_eyou _c_l_e_a_n_e_d_(clean) the room? Yes, we_h_a__v_e_d__o_n_e(do) that already. When __d_id____ you __d_o___(do) it? We __d_id____(do) it an hour ago.
2._H__a_s__ he _s_e__e_n_(see) this film yet? Yes. When _d_i_d__ he s_e__e__(see) it? He __s_a_w__ it last week.
3. How many times _h_a_v_e_you_c_o__m__e(come) here?
练习题:
1.It's a long time since we _m_e_t_ (meet) last, isn't i
t?
2.--I know youh_a_v__e__c_h_o_s_e_n(choose) a picture book amon
g these.
--Yes,Have a look at it, please.
现在完成时的否定形式: have not (haven’t) +过去分词 has not (hasn’t) +过去分词
I haven’t eaten supper.
eat-eaten
He hasn’t changed his idea. change-changed
My mother hasn’t come back home. come-come
4. Susan’s learned English at school.
Where has Susan learned English?
(for+表示一段时间的词组,since+表示过去某一时刻的词或词
组)谓语只可用延续性动词.
eg.--- I’ve lived here for 15 years.
5.Mr. and Mrs. Green have__A___in China for a week. A.been B.got C.arrived D.reached
Good-bye!
3.So far, spaceships without peopleh_a_v_e__r_e_a_c_h_e_d(reach) th
e moon and some other parts of the universe.
4.My father__C__ home for nearly three weeks. A.has gone away from B.has left C.has been away from D.went away
eg.--- I’ve lived here since 15 years ago(1990) 选用for和since填空:
1.We haven’t seen each other __fo_r___ a long time. 2.His father has been in the factory s_i_n_c_e__ 10 years ago. 3.The film has been on __f_o_r__ 20 minutes. 4.Mr Green has worked here _s_in_c__e_ he came to China. 5.His grandparents have been dead _f_o_r___ several years. 6. It’s five years __s_in__c_e_ we met last time
Once.
4. Ih_a_v_e_r_e_a_d(read) the novel twice. It’s interesting. 5. Sheh_a_s_g_o_n__e(go) to Pairs, hasn’t she? Yes.
How _d_i_d___ she _g_o_____(go) there? She _w_e__n_t __(go) there by air. 6. So far, many countries _h_a_v_e_d_e_v_e_l_o_p_e_d_(develop) their software programs. 7.Mr Chen _g_a_v_e__(give)up smoking last year. 8._H_a_v_e__ you ever _r_id_d__e_n_(ride) a horse? Never. 9.He _h_a_s_k_e_p_t_( keep) the book since two days ago.
现在完成时
• 现在完成时:
• have/ has +过去分词
• 1) 表示到现在为止已பைடு நூலகம்完成或刚刚完 成的动作。
• Now we have planted all the trees.
• He has just come back.
• 2) 表示过去发生的动作, 但强调结果或对 现在的影响。
• Have you had your supper?
把下列句子改为否定句
1. I’ve already had dinner.
I __h_a_v__e_n_’t __h_a__d___ dinner __y_e__t___.
2. He has just finished his homework.
He __h_a_s_n__’_t f_i_n_i_s_h_e__dhis homework ___y_e_t____.
eg--- I have seen the film.
eg--- I saw the film last week.
eg--- He has lived here since 1993.
eg---- He lived here in 1993.
• Notes: • 1) have gone to 与have been to • have gone to表示某人已离开了原地,去
现在完成时 Present perfect 句型
1.肯定句 现在完成时的肯定句式是“have(has)+过去分词”。 注意:该句式中的have或has是助动词,has用于第三
人称单数,其它人称一律用have。 2.疑问句
现在完成时的一般疑问句式是把助动词have或has提 到主语之前。 (回答用“Yes,...have (has)./“No,...haven’t(hasn’t).” ) 3.否定句:现在完成时的否定句式是“haven't(hasn't) +过去分词”。
对划线部分提问
1. I’ve already had dinner.
What have you already done?
2. He has just finished his homework.
What has he just done?
3. Mum’s cooked the dinner.
. Who has cooked the dinner?
肯定句
I have eaten my lunch. She has eaten her lunch. He has eaten his lunch. They have eaten their lunch.
否定句
I have not (haven’t) seen the film.
She has not (hasn’t) seen the film.
• He has studied English for 6 years.
• Mary has been busy since she came back from Hangzhou..
过去分词的构成
1.直接加-ed。如:play-played 2.以字母e结尾的直接加d 。如:namenamed 3.以辅音字母加y结尾的,变y为i加ed。如: carry-carried 4.重读闭音节且末尾只有一个辅音字母, 双写这个辅音字母再加-ed。如:stopstopped
疑问句
Have you eaten your breakfast? 现在完成时的一般疑问句形式
Have/has 提前+过去分词
Have you known Sandy for a long time? Yes, I have/ No, I haven’t. know-known
Has she eaten anything since 9:00 a.m. Yes, she has/ No, she hasn’t. eat-eaten
3. Mum’s cooked the dinner.
Mum _h__a_s_n_’_t _c_o_o__k_e_d_ the dinner.
4. Susan’s learned English at school.
Susan __h_a_s_n__’_t _le__a_r_n_e__dEnglish at school.
4. Susan’s learned English at school. Has Susan learned English at school?
分清与一般过去时的用法
现在完成时属于现在时态的范围,不能和表示过去 的时间状语连用,如yesterday,last night,three weeks ago,in1990等.而一般过去时只表示过去的动作或状 态,和现在不发生关系。
把下列句子改为一般疑问句
1. I’ve already had dinner. Have you already had dinner?
2. He has just finished his homework. Has he just finished his homework?
3. Mum’s cooked the dinner. Has mum cooked the dinner?
了另外某地,说话时,人已不在原地。后者 表示某人曾 • have been to去过某地,说话时人已不在 某地了。 • He has been to Xi‘an twice. 他曾经去过西安两次。(已经回来了)
• You can’t find him. He has gone to Xian. 你找不到他。他去西安了。(没回来)
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