语法讲解-if,as soon as,so..that 课件2022-2023学年外研版英语九年级上册

这是一份初中本册综合课前预习课件ppt，共29页。PPT课件主要包含了一If条件句，If条件句-位置，If条件句-练习，gets up，are，will be，wins，doesn’t do，will do，don’t eat等内容，欢迎下载使用。
If 引导的条件句表示：假如….情况出现了，后面会出现什么样的结果. 意思是： 如果….就…..
例如：1. If I get up late, I will be late fr schl. 如果我起床晚了，我上学就会迟到。 2 . If I dn’t finish my hmewrk, I wn’t g t bed. 如果我作业没写完，我就不上床睡觉。
If条件句-时态 1 主将从现
例如：If I’m ill, I will see a dctr. (If 后面跟be动词) 从现 主将 从句现在时， 主句一般将来时2. If it rains tmrrw, I will watch TV at hme. (If 后面跟行为动词)
If条件句-时态 1 主将从现 （否定句）
例如：If I’m ill, I will see a dctr. (If 后面跟be动词) If I’m nt ill, I will nt see a dctr. 2. If it rains tmrrw, I will watch TV at hme. (If 后面跟行为动词) If it desn’t rain tmrrw, I will nt watch TV at hme.

从句可放在主句之前或之后，但是放在主句之前须有逗号隔开。
eg:如果我有足够的钱，我就去环游世界
Tips: 不管if在哪儿，它后面跟的 都是一般现在时。
1. 如果她早点儿起床，就有时间在家里吃早餐 。 If she____ ____a little earlier, she’ll have time t eat breakfast at hme.2. 如果你参加聚会，你将会过得很开心。If yu____ the party ,yu_____ ____ a great time.
jin will have
3. 如果明天下雨，我们将不去野餐。If it _______tmrrw, we _______ _______ fr a picnic.4. 如果你经常听英文歌，你将会喜欢英语。If yu ften _____ ___English sngs, yu______ ______English.
rains wn’t g
listen t will like
1.If he____________ (nt, d ) it, I ___________(d) it.
2.If yu ____ (be) late fr schl ,my teacher ________(be) angry.
3. If she________ (win) the prize ,we _______(be) happy.
用所给单词的正确形式填空：
4.If I _________ (nt ,eat )s much ,I _________(get) thinner.
5.If yu ______(tell) them, they ________________ (nt ,believe) yu.
wn’t believe
If条件句-时态 2 主现从现
从句 （一般现在时），主句 （ 一般现在时 ）表示科学常识、事实、 经常性的动作或倾向自动会发生的事
1. If water is heated, it turns t steam. 2. If I need a haircut, I usually g t the barber’s near where I live.3. Peple ften dn’t g ut n Sundays if it rains.
if 条件句不一般, 几个要点记心间;  条件句, 放在前, 逗号要放句中间。  条件句表可能， 主将从现不一般； 条件句表事实， 主句常用现在时。
1、一...就..., 主句一般将来时,从句用一般现在时代替一般将来时, 指未发生的动作,例如：
二：as sn as 的用法
(1) I will tell him the news as sn as he cmes back. 他一回来我就会告诉他这个消息。
= As sn as he cmes back， I will tell him the news.
as sn as 的用法
(2) I will call yu as sn as I arrive Beijing. 我一到北京就会给你打电话。
= As sn as I arrive Beijing， I will call yu.
翻译成中文时需注意先翻译as sn as 后面的句子。
2. as sn as 前用一般现在时， as sn as 后也可用一般现在时
As sn as he finishes his classwrk,he runs ut f the class.他一做完课堂作业,就跑出了教室.
= He runs ut f the class as sn as he finishes his classwrk.
2、指紧接着发生的两个短动作，主从句都用一般过去时 如: (1)He tk ut his English bks as sn as he sat dwn.
= As sn as he sat dwn， he tk ut his English bks.
他一坐下就拿出了他的英语书。
(2) He left as sn as the party began.
= As sn as the party began，he left.
派对一开始他就离开了。
1 When will yu tell him the gd news? I will tell him abut it as sn as he___ back. A.cmes B.came C.will cme D.is cming
2 As sn as I _____ my hmewrk, I will g and play with yu. A.finish B.am finishing C.will finish D.finished
3 As sn as Marie pened the dr,the dg___ in. A.runs B.ran C.will run D.is running
4 As sn as his father _____ ut, the by ran t the cinema. A.ges B.ging C.went D.will g
Let's make sentences
Mther screamed as sn as she saw the muse.
They laughed as sn as they heard the news.
1、s... that...句型中的s是副词，常常用来修饰形容词或副词，意思是 “如此/这么„„以致于„„” 常用句型为：主语+谓语+s+adj+ that从句。
三：s that 的用法
(1) She is s kind that everyne likes her. 她人很好，人人都喜欢她
(2) He was s angry that he culdn't say a wrd. 他太生气了，一个字也说不出来。
He is s dirty that n ne wants t be his friends.
he/ dirty/ n ne wants t be his friends
She is s kind that everyne likes her
she/ kind / everyne likes her
She was s happy that she cried.
she/ happy / cry
He was s tired that he fell asleep.
he/ tired / fall asleep
s that和as sn as 的练习
一 .选出正确答案。1. ( ) The camera is _________ expensive __________ I can’t affrd it. A. such, that B. s, that C. enugh, that 2. ( ) Miss Ga asked a questin, but it was ________ that nbdy culd answer it. A. s difficult B. very difficult C. t difficult
3. ( )---________fine day it is tday! ---Yes, the sunshine is __________ beautiful that I’d like t g swimming in the sea. A. Hw, such B. What a, s C. Hw, s
二.填空.1. _______________I get t Beijing，I'll write t yu．2. _______________he cmes back, please let me knw.3. I will call yu _______________ I arrive in Beijing.4. He was________excited ________he culdn't get sleep.5. This teacher is_______ kind _________we all like him.