青少版新概念英语2A-Unit5(共52张PPT)

三、一般现在时的句子转换： （1）变一般疑问句：当句子中有be动词或情态动词时，则
把be动 词或情态动词(can,could等)提到主语的前面， （口诀：一调二变三问号） （2）变否定句：在be动词或情态动词后面直接加not变成 否定句 (be）后not莫忘记) 例：①陈述句：She is my sister. 否定句→ She is not my sister.
• Why are you looking up ants?
• Why not? Ants are really interesting.
“为什么不呢”， 我们可以用 “why not” 来回答“why”引
导的特殊疑问句
Grammar Point 4
• They usually live in dry places. • They don’t usually live in wet places.
• Karen: You’re joking!
• Robert: No,__r_eal_ly _!
• Karen: Do they usually _y_aw_n_in the morning, too?
• Robert: Well,_f_un_nily_e_no_ug_h , they do!
Grammar Points 1
• It’s about ants.
关于
• Translation （翻译） • What’s this about? • This song is about friendship(友谊). • --What time is it now?
--About 3:30.
Grammar Point 3
prepares a meal
come home
watch TV
What time is it?
It’s 12 o’n past one.
What time is it?
It’s a quarter past two.
What time is it?
疑问句→ Is she your sister?
②陈述句：I can play soccer. 否定句→ I can not /can’t play soccer 疑问句→ Can you play soccer?
Yes,Ican./ No, I can’t.
改写句子
1)Nancy is a girl.（改一般疑问句→肯定回答） 2)Are they good friends?（肯定回答）
ten past ten
twenty-five past ten
half past two
a quarter to twelve
twenty to eleven
o`clock past
half past
一般现在时 （The Simple Present Tense）
一般现在时表示经常发生的、习惯性的动 作或存在的状态。其时间状语为often、 usually、 always、 sometimes等频率副 词，on Saturdays、 in the morning(afternoon/ evening) 、every day（ week/year ） 等.
蚂蚁
使用 幸存
昆虫
呼吸
网页
打哈欠
网站
伸展
Words
晚上1’5’ 腿2’ Memory
生存5’
网站 3’
用2’
昆虫3’
呼吸4’
• Robert: Look at this__w_ebp_ag_e_, Mum. It’s about__an_ts _.
• Karen: Ants? Why are you __loo_kin_g_up_ants?
two weeks.
Practice： 她每天看两小时电视。 他每天睡觉八小时。 我爸爸每天早上跑步两小时。
表示某一动作持 续一段时间。
Grammar Point 6
• How about this? （这个呢？）
• Make up your own dialogue with “how about”.
ants insect webpage website look up yawn
蚂蚁 昆虫 网页 网站 查阅 打哈欠
New words and expressions:
breathe stretch survive
呼吸 伸展肢体
幸存，生存下来
use
用，使用
also
也，并且
funnily enough 十分有趣地
For example: • How old is your mother? • My mother is 35 years old. • How about your father? • He is 36 years old.
Grammar Point 7
• Karen: Do they usually yawn in the morning, too?
• Karen: Really?
• Karen: Do they __bre_ath_e _under water?
• Robert: It doesn’t say.
• Robert: Oh, Mum, how about this? Ants always _s_tre_tch_their legs in the__m_orn_in_g .
• Robert: Well, funnily enough, they do!
表示they yawn; do 在这里指代前面出 现过的动词，避免重复出现。
go to school
arrives home
listen to the news
goes to work
goes to shopping
3)They always make cake together.
（改否定句）
4)He doesn't go to school by bus.
（改肯定句）
5)I want a hamburger.
（改一般疑问句→否定回答）
Unit5 All about ants!
Discussion
• Do you know ants? • What do you think of them?
Guess “T” or “F”
•Ants usually live in wet places.
T or F
•Ants may breathe under water.
二．只有主语在第三人称单数时用动词的“三单形式”， 其他人称用动词原形。
动词三单形式的变化规则： （1）多数直接在动词词尾加-s
play — plays like — likes ask---asks work---works get---gets call---calls （2）以字母s, x, ch, sh或o结尾的动词，在词尾直接加es. watch---watches wish---wishes do---does go---goes （3）以“辅音字母加- y”结尾的动词，要先变y为i再加es try---tries study---studies cry---cries fly---flies 不规则变化： be--- is have----has
频率副词 频度比较(约等于)
always usually often sometimes hardly never
100％ 80％ 70％ 30％
1%
0
备注
总是，一直 通常 经常 有时
很少，几乎不 从不，决不
Grammar Point 5
• They can survive under water for
It’s half pas five.
What time is it?
It’s twenty to eight.
What time is it?
It’s a quarter to nine.
Attention!
分在前，时在后；
过用past，差用to； 一刻quarter；半half
five o`clock
T or F
•Ants always stretch their legs in the morning.
T or F
•Ants usually yawn in the evening.
ant
webpage
breathe
stretch
yawn
insect
New words and expressions:
• Look at this webpage.
看
• Practice • Look at _____. (I) • Look at _____. (she) • Look at _____. (he) • Look at _____. (they) • Look at _____. (us)
Grammar Point 2
• Robert: Why not?
•
Ants are really_in_te_re_st_in_g .
They do really interesting things.
• Karen: What kind of thing?
• Robert: Well, they__us_ua_ll_y live in _d_ry_places. But they can__su_rv_iv_e under water for__two_ weeks.