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練習(xí)與體會:
(綜合c級the barbie dolls)
barbie has undergone (經(jīng)歷)a lot of changes(變化) over the years and has managed (設(shè)法)to keep up with(與…保持一致) current (當(dāng)前的)時下的trends(趨勢) in hairstyles(發(fā)型), makeup(化妝) and clothing(服裝).

ⅴ、現(xiàn)在進(jìn)行時
1. 形式:
1) 現(xiàn)在進(jìn)行時由助動詞am, is, are+現(xiàn)在分詞構(gòu)成。第一人稱單數(shù)用am,第三人稱單數(shù)用is,其他人稱一律用are。
2) 現(xiàn)在分詞由動詞原形+ing構(gòu)成,如learning, making, stopping等。
 
2. 基本用法
1) 用在說話此刻正在進(jìn)行的動作。
e.g. what are you doing here?
2) 表示現(xiàn)階段正在進(jìn)行的動作,而說話此刻并不一定在進(jìn)行。
e.g. we are doing an experiment(實驗) this month.(說話時不一定在做實驗)。
   
        3. 現(xiàn)在進(jìn)行時態(tài)的否定結(jié)構(gòu):
        e.g. we are doing an experiment this month. – we are not…
       
        4. 現(xiàn)在進(jìn)行時態(tài)的疑問句結(jié)構(gòu):
        e.g. we are doing an experiment this month. – are you doing…
 
提示:
能使用現(xiàn)在進(jìn)行時態(tài)的動詞都是可持續(xù)的動詞(如:read(讀), write(寫), listen(聽)),不可持續(xù)性的動詞一般不能使用進(jìn)行時態(tài)。
比較:
e.g. he is dying(死).
e.g. the bus is coming(來).
 
考生要注意時態(tài)使用中的反?,F(xiàn)象,如:
e.g. he is always(總是) sitting(坐)there(那里), crying(哭泣).
e.g. he is being nice(友善的).
 
練習(xí)與體會:
(綜合a/b級:importance of services)
these people argue(爭辯說) that manufacturing(制造業(yè)的) jobs, which (經(jīng)濟(jì)的) foundation (基礎(chǔ))of america’s middle class(中產(chǎn)階級), are vanishing(消失). they claim(聲稱) that factory(工廠) workers are being replaced(替代)with a host of (許多的)low-wage(低收入的) earners(掙錢者). have been the economic

ⅵ、過去將來時
由“shall或will的過去式should或would+動詞原形”構(gòu)成。
表示在過去某一時刻之后將要發(fā)生的動作或情況。 過去將來時態(tài)如果出現(xiàn)在從句中, 則主句謂語動詞通常是是一般過去時。如:
e.g. we wanted(想要) to know (知道)when the english class would begin(開始).
 
過去將來時的否定和疑問結(jié)構(gòu):
it would be fine(晴朗的). 天氣會晴朗起來
it wouldn’t be fine.
would it be fine?
 
be going to do...
am/is going to do... →→→→→ was going to do...
are going to do... →→→→→ were going to
 
be to+動詞原形”
        am/is to do ... →→→→→ was to do...
        are to do... →→→→→ were to do...
 
 “be about to+動詞原形”
        am/is about to do ... →→→→→ was about to do...
        are about to do... →→→→→ were about to do...
 
 “be+現(xiàn)在分詞”
        am/is doing ... →→→→→ was doing...
        are doing... →→→→→ were doing...
 
 
練習(xí)與體會:
(綜合a/b級:plants(植物) and mankind(人類))
from then on(從那時起) humans(人類) would increasingly (日益地)make their living (謀生)from the controlled(被控制的) production(生產(chǎn)) of a few plants(植物)….
make [get, earn] one's living 謀生