内容正文:
初一下册北师大版
【寒假专版】
C版句型辨析
寒假专版
【C版句型辨析】f条件状语从句精讲
初中英语·北师大版初一下册
句型辨析精讲
辨析一f引导真实条件句vsf引导虚拟条件句(初中常见类型)
维度
f真实条件句
f虚拟条件句(初中常见类
型)
基本含义
假设可能发生的情况,“如果
假设与事实相反的情况,“如
…就…”
果…就好了”(初中多涉及
与现在事实相反)
时态搭配
主句:一般将来时/情态动词主句:would/coud+动词原
(can/may/must等)+动词原形;从句:一般过去时(be动
形:从句:一般现在时
词多用were)
例句对比
If it rains tomorrow,we will stay at home..(可能发生的假设,明天可能下雨)
If I were you,.I would study harder..(与现在事实相反,我不可能是你)
真题链接(北师大版初一下册期末真题)
-What will you do it doesn't rain this weekend?
-I will go hiking with my friends.
A.and
B.if
C.but
答案:B解析:根据答句“我将和朋友去远足”可知,问句是对“周末不下雨”这一可能情况的
假设,用f引导条件状语从句,选B。
1
初一下册北师大版
【寒假专版】
C版句型辨析
辨析二f引导条件句vs when引导时间状语从句
维度
if条件句
when时间状语从句
核心逻辑
表假设关系,“如果…”
表时间关系,
“当…时
候”(强调动作发生的时间
点/段)
时态规则
主句用将来时情态动词,从
主句用将来时,从句用一般现
句用一般现在时(主将从现)在时(主将来从现在):或主
从句均用一般过去时(主过
从过)
语境指向
强调条件的“不确定性”(可强调时间的“确定性”(动作
能发生也可能不发生)
按常理或计划会发生)
例句对比
If you finish your homework,you can watch TV.(是否完成作业是不确定的条件)
When you finish your homework,.you can watch TV.(强调完成作业这个时间点一到,就可以看电视)
真题链接(北师大版初一下册同步练习)
you see Kate,please tell her to call me back.
A.If
B.When
C.Before
答案:B解析:句意为“当你见到凯特时,请告诉她给我回电话”,强调“见到”这个时间发生
时的动作,用whn:if表假设,此处更侧重时间上的“当…时”,排除A。
辨析三if引导条件句vs unless引导条件句
维度
if条件句
unless条件句
含义表达
正面假设,“如果…(就)负面假设,
“除非…否则
…。9
…”(=if.not…)
逻辑转换if+肯定从句=unless+否定
unless+肯定从句=if+否定
从句
从句
例句对比
If you work hard,you will pass the exam.(如果努力,就会通过)
Unless you work hard,you won't pass the exam.(除非努力,否则不会通过=If you don't work hard,
you won't pass...)
初一下册北师大版
【寒假专版】C版句型辨析
真题链接(北师大版初一下册月考真题)
You will miss the bus you hurry up.
A.if
B.unless
C.when
答案:B解析:句意为“你会错过公交车,除非你快点”,即“如果不快点,就会错过”,用unless
表“除非”,选B:f表肯定条件,与句意不符,排除A。
综合训练
1.If it
tomorrow,we will have a picnic in the park.
A.rain
B.rains
C.will rain
2.you see Tom,please ask him to meet me in the library.
A.If
B.When
C.Unless
3.You won't improve your Englishyou practice speaking every day.
A.if
B.when
C.unless
4.If I a bird,I fly to the sky.
A.am;will
B.were;would
C.was;could
1.
_he comes back,please call me immediately.
3
初一下册北师大版
【寒假专版】C版句型辨析
2.She will be late for school she gets up early.
3.it snows heavily,we will stay at home and watch movies.
4.You can't pass the exam you study hard.
(从if/unless/when中选择合适的词完成句子)
1.If you don't hurry up,you will miss the bus.(用unless改写)
2.When I see Mary,I will tell her the news.(对划线部分提问,划线部分为When I see Mary)
3.If I have enough money,.I will buy a new bike.(改为虚拟语气,表示与现在事实相反)
I单项选择
1.B2.B3.C4.B
IⅡ.选短语填空/完成句子
1.When 2.unless 3.If 4.unless
II.句型转换
1.Unless you hurry up,you will miss the bus.
2.When will you tell her the news?
3.If I had enough money,I would buy a new bike.
4