现在完成时课件.ppt

The Present Perfect Tense
(Revision)
现在完成时复****br/>Walls have ears.
2. A cat has 9 lives.
3. Kings have long arms. 
know not what is good until we have lost it.
Translate the following sayings :翻译以下谚语
隔墙有耳。
猫有九条命。
普天之下，莫非王土。
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：
3、一般疑问句：
主语 + have / has not + V()+…
Have / Has + 主语 + V()+…?
Yes，主语+ have / has.
No，主语 + haven’t / hasn’t.
1、肯定句：
2、否定句：
主语（I / We / You) + have 主语（They） + have + V ()…
主语（It / He / She) + has
he has = they have =
has not = have not =
4. 缩写:
（过去分词）
he’s
they’ve
hasn’t
haven’t
规则动词的过去分词
1. work plant play
hope arrive skate
plan stop fit
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. try study cry
以辅音字母＋y结尾的动词，变y为i＋ed
+ ed
e +d
ed
ed
ed
d
d
d
ned
ped
ted
tried
studied
cried
不规则动词的过去分词
type
infinitive (A)
p. t (B)
p. p (C)
cost
cost
cost
read
read
read
come
came
come
run
ran
run
meet
met
met
catch
caught
caught
ride
rode
ridden
eat
ate
eaten
drink
drank
drunk
ABA
AAA
ABB
ABC
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
lose-lost build -built mean –meant
lend - lent send-sent spend -spent
sit –sat meet -met feel -felt
sleep -slept keep -kept sweep-swept
get -got shoot -shot forget-forgot
bring -brought buy -bought think -thought
catch- caught teach –taught fight -fought
hear -heard hold –held have –had find -found dig -dug make -made  sell -sold