内容正文:
原创新课堂
英语八年级上册人教版
Section A(Grammar Focus一3c)语法精讲
重点呈现
44444444444=4444年4
1.难过;失望upset
必记单词
2.出租车
taxi
3.劝告;建议advice
1.迟到be late(for)
重点短语
2.乘出租车take a/the taxi
3.得到足够的锻炼
get enough exercise
4.交朋友make friends
核心语法
f引导的条件状语从句
难点探究
条件状语从句通常表明事件发生的条件,表示在某种条件下,很可能会发生某种
事情或不发生某种事情。条件状语从句通常由if(如果;假如)或unless(除非;如
果不)来引导。
f条件状语从句的位置
在f引导的条件状语从句中,f条件句位置比较灵活,可放在主句前面也可放在主
句后面。若放在主句前,从句后面要用逗号和主句隔开。
eg:If he doesn't feel tired,he will visit the museum.
=He will visit the museum if he doesn't feel tired.如果他不感觉累,他就去
参观博物馆。
f条件状语从句的时态
1.当主句为一般现在时或一般将来时,f引导的条件状语从句要用一般现在时。主句
的将来时态应用will表示,不能用be going tos结构。
eg:'ll be sad if you leave now.如果你现在就走我会很难过。
If it rains tomorrow,Iwon't climb the hills.如果明天下雨,我就不爬山。
2.当主句是祈使句或主句含情态动词时,f引导的条件状语从句也要用一般现在时。
eg Help your mom with the housework if you finish your homework early.
果你完成作业早,就帮你妈妈做家务。
We must study hard if we want to pass the exam.要想通过考试,我们必须努力学
习。
【话用】(1 Jason will go to visit his grandparents----he finishes
his work this weekend.
Aunless B.though C.if D.until
A2.We should take the rest of the food home__we can't finish
what we order.
(2021,重庆A卷)
A.if B.so C.unless D.
until
f条件状语从句与其他句式之间的转换
1.借助“祈使句+and/or+含一般将来时的句子”句型来转换。在句意上and表示顺承
关系,or表示转折关系。
eg:If you get up early.you'll get there on time.=Get up early,and you'll
get there on time.
=Get up early,or you won't get there on time.早点起床,你就会准时到那里。
2.借助介词without:或With来转换条件状语从句。
eg:If there is no water,fish will die.=Fish will die without water..如果没有水,
鱼就会死。
If you help me,I'll finish the work soon.
=With your help,'ll finish the work soon.如果你帮助我,我就会快点完成工作。
3.if...not引导的条件状语从句,可以借助连词unless来转换。
eg:You will be late if you don't go there by bus.
=You will be late unless you go there by bus.如果你不乘公共汽车去那,你就会
迟到。
【话用】(C)3.Read the book Cute Pets,----you will know how to
take care of your cat.
A.or B.so C.and D.but
C )4.You'd better not hang out after school __telling your
parents.They may worry about you.(2021,青岛)
A.by B.with C.without D.after