现在完成时 课件

2、否定句： 主语 + have / has not + V(p.p)+…
Have / Has + 主语 + V(p.p)+…?
3、一般疑问句：Yes，主语+ have / has.
No，主语 + haven’t / hasn’t.
4. 缩写:
he has = he’s they have = they’ve has not = hasn’t have not = haven’t
The Present Perfect Tense
(Revision)
现在完成时复习
Translate the following sayings :翻译以下谚语
1. Walls have ears.
隔墙有耳。
2. A cat has 9 lives.
猫有九条命。
3. Kings have long arms.
三. 表示某人曾有过或到目前为止从未有过的 经历. Have you ever been to the moon? (你曾去过月球吗?) I have never had a car.
(我从未有过汽车。)
现在完成时的主要用法
四.句型This / It is the first / second/... time…也常与现在完成时连用。 This is the third time he has driven a car . 这 是他第三次开车
普天之下，莫非王土。
4.We know not what is good until we have lost it.
好东西，失去了才明白/珍惜。
现在完成时的基本结构
1、肯定句：
主语（I / We / You) + have
主语（They）
+ have + V (p.p)…
主语（It / He / She) + has （过去分词）
already (肯定句，句中/ 末) yet (在否定句和疑问句中代替already,句末)， never，ever(疑问句和否定句) ，just (句中)， before(句末，常与never连用) ， once, twice， these days, recently (近来,最近)， lately (近来,最近 )， in the past / last few years, (在过去的几年里), so far= up to now, till now, by now
2）过去式加-n或-en构成过去分词。
speak -spoke -spoken break-broke(n)
steal-stole(n) forget-forgot (ten)
freeze-froze(n)
choose-chose(n)
不规则动词的过去分词 ABC
（3）变单词在重读音节Leabharlann Baidu的元音字母“i” 分别为“a”(过去式)和“u”(过去分词) begin -began-begun
五. 现在完成时和形容词最高级连用表示到现
在为止是“最…的”.
What an interesting book！
It’s the most interesting book I’ve ever read.
一本多么有趣的书啊！这是我读过的最有趣
的书。
下一页
现在完成时的时间状语
一. 现在完成时常与不确定的时间状语连用：
drive-drove see-saw
wake-waked /woke
throw-threw blow-blew grow-grew
know-knew draw-drew show-showed
take-took shake-shook give-gave
write-wrote-written
ride-rode-ridden
mean –meant spend -spent feel -felt sweep-swept forget-forgot think -thought fight -fought
ABC
不规则动词的过去分词
1)在动词原形后加-n或-en构成过去分词。
eat -ate -eaten fall-fell beat-beat
不规则动词的过去分词
type
AAA ABA ABB
ABC
infinitive (A) cost read come run meet catch ride eat drink
p. t (B) cost read came ran met
caught rode ate drank
p. p (C) cost read come run met caught ridden eaten drunk
drink ring sing swim
(4)其他不规则动词的变化。 go -went -gone am / is -was -been are-were -been do -did -done lie -lay -lain wear -wore -worn fly-flew-flown
现在完成时的主要用法 一.表示过去发生的某一动作对现在造成的 影响或结果。
规则动词的过去分词
1. worked planted 2. hope d arrived
played + ed skate d e +d
3. planned stop ped
fit ted
以重读闭音节结尾，末尾只有一个辅音字母的 动词，先双写辅音字母再＋ed.
4. trytried study studied cry cried 以辅音字母＋y结尾的动词，变y为i＋ed
I have just finished my homework. He has watched that movie twice.
二、某个动作从过去已经开始,一直持续到现在,还有可 能 持续到将来.动作的持续性要通过一段时间来表示.He has watched TV for half an hour.
不规则动词的过去分词 AAA: cost- cost - cost read-read-read beat cut hit hurt let set shut
ABA: run-ran -run come - came - come become - became - become
不规则动词的过去分词 ABB get-got-got
lose-lost lend - lent sit –sat sleep -slept get -got bring -brought catch- caught
build -built send-sent meet -met keep -kept shoot -shot buy -bought teach –taught