初中英語知識點講解
初中英語知識點講解
為了幫助大家強化英語知識點的記憶,下面學習啦小編為大家?guī)沓踔杏⒄Z知識點講解,供大家參考學習。
初中英語知識點講解:定語從句
一、關系代詞引導的定語從句
1、由who, whom, that,Whose引導的從句
這些詞代替的先行詞是人的名詞或代詞,who作主語指人,whom作賓語指人,that既可作主語又可作賓語(作賓語可以省略),可以指人也可以指物。Whose 用來指人或物,只用作定語。
(1) Is he the man who/that wants to see you? 他是那個想見你的男人嗎?(who/that在從句中作主語)
(2) He is the man whom/ that I saw yesterday. 他就是我昨天見的那個人。(whom/that在從句中作賓語)
(3) The man whom you spoke to just now is our English teacher 你剛剛說話的那個男人是我們的英語老師
(4) he man whose son is a doctor is our professor. 那個兒子是醫(yī)生的男人是我們的教授。
2、由which, that引導的從句
它們所代替的先行詞是事物的名詞或代詞,在從句中可作主語、賓語等,作賓語時可以省略,例如:
(1) Prosperity which / that had never been seen before appears in the countryside. 農(nóng)村出現(xiàn)了前所未有的繁榮。(which / that在從句中作主語)
(2) The package (which / that) you are carrying is about to come unwrapped. 你拿那個包裹快要散開了。(which / that在從句中作賓語)
注意: 代表物時多用which,但在下列情況中用that而不用which:
a)先行詞是anything, everything, nothing , none等不定代詞時;
b)先行詞由every, any, all, some, no, little, few, much等修飾時,這時的that常被省略;
c)先行詞前有序數(shù)詞或被形容詞最高級修飾時;
d)先行詞中既有人又有物時;
e)整個句中前面已有which,who,that時;
f)當先行詞為物并作表語時;
g)先行詞為one時;
h)先行詞同時又被the only,the very,the same修飾時;
二、關系副詞引導的定語從句
1、when指時間在定語從句中做時間狀語也可做連接詞用 I still remember the day when I first came to the school.
2、where指地點在定語從句中做地點狀語 Shanghai is the city where I was born.
3、why指原因在定語從句中做原因狀語 ,用在reason 后面。 Please tell me the reason why you missed the plane.
初中英語知識點講解:虛擬語氣
一、條件狀語從句
1、與現(xiàn)在事實相反
若與現(xiàn)在事實相反,虛擬語氣的條件從句的謂語用過去式(be通常用were),主句謂語用“should (would, could, might)+動詞原形”。如:
If I were you, I would take an umbrella. 如果我是你,我會帶把傘。(事實上我不可能是你)
If I knew her number I could ring her up. 要是我知道她的電話號碼,我就可以給她打電話了。(事實上我不知道)
2、與過去事實相反
若與過去事實相反,從句:主語+had done , 主句:主語+should/would/could/might+have done ,例如:
If I'd left sooner,I'd have been on time. 要是我早點動身,我就準時到了。(但我動身太遲了)
If I had got there earlier, I should/could have met her. 如果我早到那兒,我就會見到她。 (事實:去晚了)
3、與將來事實相反
從句:①if+主語+were to do 主句:①主語+should/would/could/might+do
②if+主語+did/were ②主語+should/would/could/might+do
?、踚f+主語+should+do ③主語+should/would/could/might+do
例如:If he went,would you go too? 如果他去,你也去嗎?(大概他不會去)
If he should come here tomorrow, I would talk to him. 如果他明天來這兒的話,我就跟他談談。 (事實:來的可能性很小)
注意與說明:對于與將來事實相反的情形,請注意以下幾點:
一是這里說的與將來事實相反,實為對將來情況的推測;
二是此用法中的條件從句謂語除用過去式外,有時也用“should+動詞原形”(表示可能性極小,常譯為“萬一”)或“were to+動詞原形”(表示與將來事實相反的假設);
三是當條件從句使用“should+動詞原形”這樣的謂語時,主句謂語除可用“should (would, could, might)+動詞原形”這樣的虛擬語氣外,也可用陳述語氣或祈使語氣。如:
I should see him, I'll tell him. 萬一我見到他,我就告訴他。
If it should rain tomorrow, don’t expect me. 萬一明天下雨,就別等我了。
二、wish 后賓語從句
1、表示與現(xiàn)在事實相反的愿望,謂語動詞用過去式 。例如:
I wish I had your brains. 我希望我有你那樣的頭腦。(事實:我根本比不上你)
2、表示與過去事實相反的愿望,謂語動詞:had+done 例如:
I wish I had knownthe truth of the matter. 我希望我那時就知道這件事情的真相。(事實:那時還不知道)
3、表示將來難以實現(xiàn)的愿望,謂語動詞:should/would(情態(tài)動詞) + 動詞原形
I wish I should havea chance again. 我希望我還能有一次這樣的機會。(事實:很難再有這樣的機會了)