人教英语八年级下册Unit10现在完成时 (共33张PPT)

1. since意为“自从……以来”, 它既可作 介词，也可作连词。作介词时, 后接表 示过去的时间点, 表示某事开始的时间； 作连词时, 引导时间状语从句, 从句常用 一般过去时。如：
We have been here since last Sunday / two years ago. Mr. Jones has worked here since he was twenty-five.
4. Cathy and Amy _h_a_v_e_n_’_t _b_e_e_n_ (not be) back to their hometown for two years. They _m__i_ss__ (miss) their hometown a lot and hope to visit the place next year.
1. Do you have a(n) _______? How long have you had it?
2. Do you own a(n) _______? How long have you owned it?
Things
How long
Tony favorite book for two years
over there? --I’ve had it for three years. 2. --How long has his son owned the
train and railway set? --He’s owned it since his fourth
birthday.
根据课本内容, 完成下，表示 一个动作或一种状态已经持续了多 长时间。如：
I have studied here for three years. She has been away for five days.
注意： 1. 对since和 for引导的时间状语提问时,
常用how long。如： Jane has learned to play the piano since two years ago. (对划线部分提 问) How long has Jane learned to play the piano?
2. Helen has had this camera for one month. (对划线部分提问) __H__o_w__ __l_o_n_g__ __h__a_s__ Helen __h_a_d___ this camera?
3. Mona went to Shanghai two days ago. (改为同义句) Mona __h__a_s___ __b_e_e_n___ in Shanghai since two days ago.
2. 在现在完成时中，含有for和since的 句子可以相互转换。如： They have lived here for five years. =They have lived here since five years ago.
3. 在现在完成时中，表示短暂意义的 动词(如come和see)在肯定句和一般 疑问句中不能和表示一段时间的时 间状语连用，但在否定句中是可以 的。如：
A: Never mind. I only (12)___w__a_n_te_d_____(want) to invite you to a party next week at my house.
(not clean) everything yet. A: I (9)___c_a_l_le_d_____(call) you on
Tuesday but there (10)____w_a_s______(be) no answer.
B: I (11)___w__a_s______(be) busy at my new house then.
4. I got to know Gina three years ago. (改为同义句) I ___h_a_v_e__ __k_n_o_w__n_ Gina for three years.
Ⅱ. 根据对话内容及括号内所给词的提 示填空。
A: Hello, Billy. I (1)_h_a_v_e_n_’_t_s_ee_n__(not see) you for a long time.
B: Well, I (5)___g_o_t_______(get) my degree (学位) last month and then I (6)___m__o_v_e_d____(move) house.
A: When (7)_d_id__y_o_u__m_o_v_e_(you / move)? B: Last week, but I (8)h_a_v_e_n_’_t_c_l_e_a_n_e_d
Yes, I did when I was little, but I _h_a_v_e_n_’_t_p_l_a_y_ed_ for a while now.
现在完成时的持续型用法 现在完成时还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，该用法中的动词多是延续 性动词，常见的时态标志词有since, for等。
3. I have a camera. I bought it in 2009. I have had a camera since 2009.
4. I know Anna. I first met her three years ago. I have known Ann for three years/ since three years ago.
B: Yes, I (2)__h_a_v_e_b__ee_n___(be) very busy recently.
A: Really? Tell me what you (3)__h_a_v_e__d_o_n_e__(do) since we last (4)____s_a_w____(see) each other.
basketball Student 1
since he was 10 years old
Student 2
1. 现在完成时的特殊疑问句的结构： 疑问词 + have/has + 主语 + 过去分词 + 其他成分。询问时间长短的疑问词 用how long。
2. 介词for后接一段时间，指某个动作或 情况到现在为止已持续了多久。
2. They _h_a_v_e__n_e_v_e_r_o_w_n__ed__ (never own) any pets, but they h__a_v_e_a_lw__a_y_s_w__a_n_te_d_ (always want) to have a dog.
3. We _h_a_v_e__h_a_d_ (have) a piano since last November. We _b_o_u_g_h__t (buy) it from the Li family when they moved to the US last year.
3. since有两种用法，分别是： ① 作为介词，接一个时间名词； ② 作为连词，引导一个时间状语从句。
since表示“自……以来”，指某个动 作或情况从过去某一点时间一直持续到 现在。
Ⅰ. 根据括号内的要求完成下列各题， 每空一词。
1. My uncle has ever played baseball for Green Team. (改为一般疑问句) __H__a_s____ ___y_o_u_r___ uncle ever __p_l_a_y_e_d__ baseball for Green Team?
2. 有些短暂性(短语)动词可转化为表示 状态的短语。常见的有： leave → be away begin / start → be on die → be dead finish → be over join → be in / be a member of fall asleep → be asleep marry → be married come / arrive here → be here
5. This museum _h_a_s__b_e_e_n_ (be) here for over 20 years. It __is___ (be) one of the oldest buildings in this small town.
4c
Fill in the questions and ask two students. Then complete the chart.
Mike has come to London for three weeks. (×)
They haven’t seen each other for ages. (√)
短暂性(短语)动词与延续性(短语)动词 和与表示状态的短语之间的转化 1. 有些短暂性(短语)动词可转化为相应
的延续性(短语)动词。常见的有： become → be borrow → keep buy → have / own catch a cold → have a cold come → stay put on → wear go to sleep → sleep move to → live in
at first 起初；起先 grow up 长大；成熟；成长 as for 至于；关于 junior high school 初级中学 part with 放弃、交出(尤指不舍得的 东西) to be honest 说实在的 bread maker 面包机
To learn the usage of for and since 1. --How long have you had that bike
1. 那边那辆自行车你骑了多久了？ _H__o_w__lo_n_g__ have you had that bike over there?
2. 我已经骑了三年了。 I’ve had it _f_o_r_t_h_r_ee__y_e_a_r_s_.
3. 他的儿子拥有火车和轨道多久了？ _H_o_w__l_o_n_g_h_a_s__h_is__so_n__o_w__n_e_d_ the train and railway set?
4. 他从四岁生日时就有了。 He’s owned it _s_in_c_e__h_is__fo_u_r_t_h___ _b_i_r_th_d_a_y__.
5. 你踢过足球吗？ _H__a_v_e_y_o_u__e_v_e_r_ played football?
6. 是的，当我小的时候踢过。但是现 在已经有好一阵没有踢过了。
5. Linda is ill. She became ill on Monday. Linda has been ill since Monday.
4b Fill in the blanks with the correct
forms of the verbs in brackets.
1. I _h_a_v_e__n_e_v_er__b_e_e_n_ (never be) to the water park before. I want to __g_o__ (go) next month before the weather gets too cold.
4a Rewrite the sentences using
for or since.
1. Jim is in Japan. He arrived there three days ago. Jim has been in Japan for three days.
2. They are very hungry. Their last meal was ten hours ago. They have been hungry for ten hours/ since ten hours ago.