内容正文:
专题02 重点语法归纳【考点串讲】
主讲人:小k君
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模块一U1语法清单
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模块二 U2语法清单
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模块三 U3语法清单
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模块四 U4语法清单
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模块五 语法专练
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模块一U1语法清单
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模块二 U2语法清单
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模块三 U3语法清单
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模块四 U4语法清单
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模块五 语法专练
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模块一U1语法清单
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【核心语法考点一】现在完成时的用法
用法1:表示一个过去发生的动作对现在
产生的结果和影响。
Eddie has eaten my food. Eddie吃了我的
食物。
用法2:表示一个从过去某个时间开始,延
续到现在,并有可能继续延续下去的动作
或状态。
He has lived here since 1995. 自从1995年以来,他一直住在这儿。
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用法3:表示到现在为止,某一个动作发生了多少次
I have already read this book many times so far.(到现在为止,我已经读过这本书许多次了)
【核心语法考点二】现在完成时的句式
1.构成 助动词has/have +动词的过去分词
陈述句They have finished their homework.
He has finished his homework.
否定句They haven't finished their homework.
He hasn't finished his homework.
一般疑问句Have they finished their homework?
Yes, they have. / No, they haven't.
规则动词的过去分词的构成
1.大多数的动词的过去分词是规则的,只需在动词后加-ed;例如:
work→workedlisten→listened jump→jumpedvisit→visited
1.在以-e结尾的动词后只加-d;例如:
close→closedlike→liked agree→agreedmove→moved
3.在以辅音字母加y结尾的动词,应将y改为i再加ed;例如:
study→studiedcarry→carriedtry→triedworry→worried
4.以重读闭音节结尾的动词,要双写末尾的辅音字母再加-ed;例如:
stop→stoppeddrop→dropped
2.动词的过去分词:
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不规则动词的过去分词的构成
1. 有些动词的原形和过去分词相同;例如:
put→puthurt→hurtbecome→becomerun→run
2.改变单词中间元音字母;例如:
sit→satwin→wonhold→held
3.把单词结尾的字母d改为t;例如:
lend→lentspend→spentsend→sent
4.以eep结尾的动词,把eep改为ept;例如:
keep→keptsleep→slept
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5. 过去分词以aught或ought结尾;例如:
teach→taughtbuy→bought
6.以ay结尾的动词,把ay变成aid;例如:
say→saidpay→paid
7.在原形词尾加n或en;例如:
give→giveneat→eaten
【核心语法考点三】现在完成时的时间状语
already(用于肯定句), yet(用于否定句和疑问句), since+一点时间, for+一段时间,
never, ever, three times(其它表示频率的词, once, twice等)
before, recently, in the past/last few years, so far, this month, today, now
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知识点1:already与yet用法区别
already 用于肯定句,一般放在助动词与过去分词之间。
yet用于否定句和疑问句,一般至于句末。
例1:I have already worked out this math problem? (改为否定句)
I________________ worked out the math problem ________.
解析:already与yet的转换.Key : have not; yet
知识点2:ever、never与before用法区别
(1)ever表示曾经
(2)never表示从不
(3)before表示以前
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例:--Have you ever read this book?--No, I haven't.
I have never watched t