现在完成时态课件(共68张PPT)讲解学习

注意：当在肯定句中含already或 just，变否定时，在句末加yet。
● I have already seen the film. I haven’t seen the film yet.
● Mother has just cleaned the house. Mother hasn’t cleaned the house yet.
yet for just
ever never since
I _h_a__ve__ just _m_e_n_d_e_d__ the desk, you
can take it to your classroom . (mend )
Key words
(3) ever 肯定句/疑问句 : 句中 “曾经”
I’ve ever been to Beijing. Have you ever been to Beijing?
(4) never
否定句: 句中 “从来没有” I’ve never been to Beijing.
注: 带ever的肯定句变否定句时, 将 ever变never
left school ten years ago. (work )
Key words
yet ever never since for
A: How long __h_a_v_e_ you __ta_u_g_h_t__ in this
school? (teach ) B: For 6 years.
Key words
• Have you met him before? • 你以前见过他吗？ • My brother met her in the street two days
ago. • 我哥哥两天前在街上遇到了她。 • I have just had breakfast. • 我刚吃过早餐。 • She had breakfast just now. • 她刚吃了早餐。
动词过去分词 (pp)变化规则
1. 规则动词：与过去时变化相同。 (1) 一般+-ed
work---worked---worked (2) 以“ e ”结尾, + - d 。
live---lived ---lived (3) “辅音字母 + y” 结尾，y 变 i, + -ed。
cry---cried---cried (4) 重读闭音节结尾(辅元辅)，双写后+-ed 。
一般疑问句: 句末(表示惊讶的语气) “难道”
Have you had breakfast already？ (表示强调)
(2) yet
否定句:句末 “还(没)” I haven’t had breakfast yet.
疑问句: 句末 “己经” Have you had breakfast yet?
B: Yes, I have.
Key words
yet ever never
I __h_a_v_e_ never __h_e_a_r_d of anything like
that. (hear )
Fra Baidu bibliotek
Key words
yet ever never since
Tom h_a_s__w_o_r_k_e_d__ in the factory since he
最近
in the past/last 5 years 过去五年
by now, so far, up to now, till now 迄今
once, twice…
一次…
all/in one’s life
某人一生
（1）already
肯定句: “己经”
I’ve already had breakfast. (更常见) = I’ve had breakfast already.
He has ever made meal. He has never made meal.
带ever的一般疑问句作否定回答时 可用“No, never.”
Have they ever travelled by train?
No, never.
(5) just 用于句中, 表示“刚刚”
I’ve just had breakfast. What have they just done?
(6) before 用于句末, 表示“以前”
I’ve seen it before. Has she ridden a bike before ?
② before与ago，just与just
now
before表示现在看来的“以前”，常 单独用于现在完成时中，一般不与表示 一段时间的词语连用，而ago表示在过去 某时间的“以前”，常用“一段时间 +ago”的形式，与过去时连用；just常与 现在完成时连用，多用于句中助动词之 后修饰谓语动词，just now多与一般过去 时连用，一般用于句末。如：
Key words
yet
A: __H_a_s__ your brother __b_o_u_g_h_t __ a new
watch? (buy ) B: Not yet.
Key words
yet ever
A: _H_a_v_e___ you ever __b_e_e_n__ to the
park? ( be )
drop---dropped--dropped 2 、不规则动词，见不规则表（p120）
二 含义及用法
1 表示过去发生的动作或事情， 对现在的影响和产生的结果。
常用的关键词
yet(否/疑), already 已经
ever/never
曾经/从来不
just
刚刚
before
以前
recently, lately
现在完成时态课件(共68张PPT)
I have finished my homework. I have not finished my homework. Have you finished your homework? Yes, I have./No, I haven’t.
She has been to Europe. She hasn’t been to Europe. Has she been to Europe? Yes, she has./No, she hasn’t.