九年級(jí)英語上冊重要知識(shí)點(diǎn)(2)
九年級(jí)英語上冊重要知識(shí)點(diǎn)
四. 重要語法
1. 賓語從句
2. 現(xiàn)在完成時(shí)
3. 一般過去時(shí)與現(xiàn)在完成時(shí)的用法比較
五.重要知識(shí)點(diǎn)講解
1. Maybe/ may be
(1) maybe是副詞,意思是“大概,也許”,常用作狀語。例如: Maybe you put it in your bag.也許你把它放在包里了。“Will he come tomorrow?”“Maybe not.” “他明天來嗎?”“也許不”。
(2) may be相當(dāng)于是情態(tài)動(dòng)詞may與be動(dòng)詞搭配一起作謂語,意思是“也許是…,可能是…”。
例如:It may be 9:00 when they arrive.他們可能于九點(diǎn)到達(dá)。The man may be a lawyer. 那人也許是律師。
2. borrow/ lend/ keep/ use
(1) borrow表示的是從別人那里借來東西,即我們通常所說的“借進(jìn)來”。例如:We often borrow books from our school library.我們經(jīng)常從學(xué)校圖書館借書。I borrowed this dictionary from my teacher. 我從老師那兒借來了這本字典。
borrow是一個(gè)瞬間完成的動(dòng)作,因此不能與時(shí)間段連用。
例如:You can borrow my recorder for three days. ( 錯(cuò)誤 )I have borrowed this book for only one week. ( 錯(cuò)誤 )
(2) lend表示的是把自己的東西借給別人,即我們通常所說的“借出去”。 例如:Thank you for lending me your bike.謝謝你把自行車借給我。He often lends money to his brother.他經(jīng)常借錢給他弟弟。
lend與borrow一樣,也是一個(gè)瞬間完成的 動(dòng)作,不能與一段時(shí)間連用。
(3) keep的意思也是“借”,但一般是指借來后的保存或使用階段,是一段持續(xù)的時(shí)間,因此可以與時(shí)間段連用。例如:You can keep my recorder for three days.我的錄音機(jī)你可以借用三天。
I have kept this book for only one week.這本書我才剛借了一星期。
(4) use也可以當(dāng)“借用”講,但它的本意是“用,使用”。例如:May I use your ruler? 我能借你的尺子用一下嗎?He had to use this public telephone.他不得不使用這部公用電話。
3. leave/ leave for
(1) leave意思是“離開,留下”。 例如:We left Shanghai two years ago.我們兩年前離開了上海。
He left his cell phone in the taxi last week.他上周把手機(jī)落在出租車?yán)锪恕?/p>
(2) leave for意思是“前往”,表示要去的目的地。例如:We will leave for Tibet next month.我們將于下月去西藏。The train is leaving for Moscow.這趟火車即將開往莫斯科。
4. since/ for
(1) since用于完成時(shí)態(tài),既能用作介詞,也能用作連詞,后常接時(shí)間點(diǎn),意思是“自從”。 例如:
He has been a worker since he came into this city.自從他來到這個(gè)城市,他就是工人了。
I have never seen him since we last met in Shanghai .自從我們上次在上海見過之后我再也沒見過他。
since作連詞,還有“既然”的意思。例如: Since you are interested in it, just do it. 既然你對(duì)它感興趣,那就做吧。 You can have fun now since you’ve finished your work.既然你已經(jīng)做完了功課,就開心玩會(huì)兒吧。
(2) for用于完成時(shí),用作介詞,后常接一段時(shí)間,意思是“經(jīng)過…”。例如: I have learned English for five years.我已經(jīng)學(xué)了五年英語了。They have waited for you for 30 minutes.他們已經(jīng)等了你三十分鐘了。
for也可以用作連詞,但意思是“因?yàn)?rdquo;。 例如: They missed the flight for they were late.他們由于完到了而誤了航班。He fell ill for many reasons.他由于多種原因病倒了。
5. neither/ either/ both
(1) neither作代詞是對(duì)兩者都進(jìn)行否定,意思為“兩者都不”,作主語時(shí)謂語動(dòng)詞用單數(shù).例如:Neither of the boys is from England.這兩個(gè)男孩都不是來自英國。I know neither of them. 他們兩個(gè)我都不認(rèn)識(shí)。
neither用作形容詞,也修飾單數(shù)名詞,意思與作代詞時(shí)相同;用作連詞時(shí),一般與nor搭配,表示 “既不…也不”。作主語時(shí),謂語動(dòng)詞也遵循就近原則。 例如:She neither ate nor drank yesterday. 她昨天既不吃也不喝。Neither he nor we play football on Sundays. 他和我們星期天都不踢球。
(2) either作代詞時(shí),是指兩者中的任意一方,(兩者之)每一個(gè),故作主語時(shí)謂語動(dòng)詞用單數(shù).
例如:Either of the books is new.這兩本書任何一本都是新的.
She doesn’t like either of the films.這兩部電影她都不喜歡.
either作形容詞, 用來修飾單數(shù)名詞,意思與作介詞時(shí)相同.
例如:Either school is near my home. (這兩所學(xué)校中的)任何一所學(xué)校都離我家很近.
Either question is difficult.兩個(gè)問題(中的任何一個(gè))都難.
either作連詞時(shí),一般與or搭配,表示兩者選其一,意思是“不是…就是”。作主語時(shí),謂語動(dòng)詞遵循就近原則。
Either he or I am right.不是他就是我是對(duì)的。
Either my sister or my parents are coming to see me.不是我姐姐就是我父母要來看我。
(3) both作代詞時(shí),指的是所涉及到的“兩者都”, 故作主語時(shí),謂語動(dòng)詞用復(fù)數(shù)形式。
I like both of the stories.這兩個(gè)故事我都喜歡。Both of my parents are teachers.我父母兩人都是老師。
both作形容詞時(shí),用來修飾兩者,意思與作代詞時(shí)相同.Both his arms are hurt.他的兩只胳膊都受傷了。
Both these students are good at English. 這兩個(gè)學(xué)生都擅長英語。
both用作連詞時(shí),多與and搭配,表示“既…又, 不僅…而且”, 作主語時(shí),謂語動(dòng)詞仍用復(fù)數(shù)形式。
Both piano and violin are my bobbies.鋼琴和小提琴都是我的愛好。
They study both history and physics. 他們既學(xué)歷史,又學(xué)物理。
6. find/look for/ find out
(1) find強(qiáng)調(diào)找的結(jié)果,意思是“找到”。此外還有“發(fā)現(xiàn),發(fā)覺”的意思,后可接賓語從句。
例如:Jim couldn’t find his hat.吉姆找不著帽子了。Have you found your lost keys? 你找到丟失的鑰匙了嗎?
He found the lights were on along the street.他發(fā)現(xiàn)沿街的燈都亮了
(2) look for的意思為“尋找”,指的是找的動(dòng)作而非結(jié)果。另外,還有“盼望,期待”的意思。
例如:She is looking for her son.她正在找她的兒子。
We’ve been looking for the car since early this morning.我們從今天一大早就開始找這輛車了。
I look for the coming holiday.我期待著即將來臨的假期。
(3) find out含有經(jīng)過觀察、研究或探索而得知的意思,后常接較抽象的事物,意思是“找出,發(fā)現(xiàn),查明(真相)”等。
例如: I can find out who took my money away.我能查出誰拿了我的錢。
Could you find out when the plane arrives? 你能設(shè)法知道飛機(jī)何時(shí)到嗎?
7. forget to do/ forget doing
(1) forget to do是指忘記去做某件事了,即該事還沒有做。
例如: Please don’t forget to call this afternoon.今天下午不要忘了給我打電話。
I forgot to take some small change with me.我身上忘了帶零錢了。
(2) forget doing是指忘記某件已經(jīng)做過的事情,即該事已經(jīng)做了,但被忘記了。
例如:He forgot telling me his address.他忘了告訴過我地址了。
They forgot having been here before.他們忘了以前曾來過這兒。
8. stop doing/ stop to do
(1) stop doing是指停止做某事,即doing這個(gè)動(dòng)作不再繼續(xù)。
例如:They stopped debating.他們停止了辯論。(不辯論了)
He had to stop driving as the traffic lights changed in to red. 由于交通燈變成了紅色他不得不停車。
(2) stop to do是指停下來開始做另一件事,即停止原先的事,開始做do這個(gè)動(dòng)作。
例如:She stopped to have a rest.她停下來休息會(huì)兒。(開始休息)They stopped to talk.他們停下來開始交談。
9. except/ besides
(1) except是指不包括后面所提人或物在內(nèi)的“除了”,可以理解為“撇開…不談”,表示兩部分的不同。 Everyone is excited except me.除我以外的每個(gè)人都很激動(dòng)。(他們激動(dòng),而我卻不激動(dòng))All the visitors are Japanese except him.除他以外的所有游客都是日本人。(其他人是日本人,可他不是)
(2)besides是包括后面所提人或物在內(nèi)的“除了”,可以理解為“除之外…還、除之外…又”,表示兩部分的相似性。
例如:Twenty-five students went to the cinema besides him.除他以外,還有25個(gè)學(xué)生去看了電影。(他和另外25人都去了)
We like biology besides English.除了英語外,我們還喜歡生物。(生物和英語都喜歡)
besides還可用作副詞,意思是“此外;而且”,常用于句首或句尾。
例如:He is a great thinker, and besides, he is a politician.他是一名偉大的思想家,除此以外,他還是一位政治家。
They encouraged me, and they supported me with money, besides. 他們不僅鼓勵(lì)我,而且與我以金錢上的支持。
10. keep doing/ keep on doing
(1) keep doing指的是連續(xù)地、堅(jiān)持不斷地做某事,中間不間斷。
例如:It kept blowing for a whole day.刮了一整天風(fēng)了。
The temperature keeps dropping.溫度持續(xù)下降。
(2) keep on doing是指反復(fù)堅(jiān)持做某事,但動(dòng)作之間略有間隔。
例如:They have kept on writing to each other for many years.他們已經(jīng)互相通信多年了。
After drinking some water, he kept on talking.喝了一些水后,他堅(jiān)持講話。
11. seem/ look
(1) seem一般著重于以客觀跡象為依據(jù),意思是“似乎、好象、看起來…”。
例如:The baby seems to be happy.嬰兒看上去似乎很高興。
He seemed to be sorry for that.他似乎為那件事感到抱歉。
seem能與to do結(jié)構(gòu)連用,而look不能。
例如:It seems to rain. 似乎要下雨了。
They seemed to have finished their work.他們似乎已經(jīng)完成了工作。
在it作形式主語的句型中只能用seem。
例如:It seems that he is quite busy now.他現(xiàn)在看起來很忙。
It seems to us that there is nothing serious.在我看來沒什么大不了的。
(2) look用作“看起來;好像”時(shí),常從物體的外觀或樣貌上來判斷,是以視覺所接受的印象為依據(jù)的。
例如:The room looks clean.這間房看起來很干凈。The girl looks like her mother.那女孩看起來向她的媽媽。