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練習(xí)與體會(huì):
(衛(wèi)生類c/b級(jí)文章:smoking)
(1)smoke(煙) is a mixture(混合物) of gases(氣體), vaporized(被蒸發(fā)的) chemicals(化學(xué)制品), minute(微小的) particles(粒子) of ash (灰)and other(其他的) solids(固體). (2)there is also (也)nicotine(煙堿), which (強(qiáng)大的) poison(毒藥), and black(黑色的) tais powerfulr(焦油). (3)as(在…的時(shí)候)smoke is breathed in(被吸入), (4)all those components(成分) form (形成)deposits (沉淀物)on the membranes(隔膜) of the lungs(肺).

ⅱ、一般過去時(shí)
1. 形式
1) 動(dòng)詞be除第一人稱單數(shù)和第三人稱單數(shù)用was外,其余一律用were。
2) 動(dòng)詞have一律用had。
3) 行為動(dòng)詞過去時(shí)的形式分兩種:規(guī)則動(dòng)詞和不規(guī)則動(dòng)詞。前者由動(dòng)詞原形+(e)d構(gòu)成,如worked, used, studied, stopped等,后者如made, said, wrote等,屬于不規(guī)則的構(gòu)成形式, 須逐個(gè)記憶。
過去式/過去分詞構(gòu)成不規(guī)則的動(dòng)詞,常見的有:
make –made –made;
say – said – said
write – wrote – written
go – went – gone
do– did – done
leave –left –left
sleep – slept – slept
rise –rose –risen
arise –arose –arisen
drive --drove –driven
drink – drunk – drunk
take –took –taken
put – put –put
beat –beat – beaten
come –came –come
run –ran –run
choose –chose –chosen
give –gave –given
cut –cut—cut
break – broke –broken
meet – met --met
ring –rang –rung
beat – beat --beaten
 
 
 
一般過去時(shí)態(tài)基本用法
用于表示過去的某時(shí)刻或某一時(shí)期內(nèi)的動(dòng)作或狀態(tài)。常與表明過去時(shí)間的狀語連用,如yesterday, then(當(dāng)時(shí)), just now(剛才), two days ago, 或由when或while等引導(dǎo)的表明過去時(shí)間的狀語從句。
e.g. we met (遇見)him last month(上個(gè)月).
e.g. they stayed at home yesterday.
e.g. he was a doctor.
 
一般過去時(shí)態(tài)否定結(jié)構(gòu)的構(gòu)成:
1) 如果謂語部分是行為動(dòng)詞,在構(gòu)成否定結(jié)構(gòu)時(shí), 需要在謂語結(jié)構(gòu)中的行為動(dòng)詞的前面添加助動(dòng)詞did和否定副詞, 并且需要把原來謂語部分的過去分詞結(jié)構(gòu)還原成動(dòng)詞的原形。
e.g. we met him last month.-- we didn’t meet him last month.
e.g. they stayed at home yesterday.—they didn’t stay at home yesterday.
 
2) 如果謂語部分是be動(dòng)詞,在構(gòu)成否定結(jié)構(gòu)時(shí)只需要直接在be的后面添加否定副詞not。
e.g. he wasn’t out yesterday. 
         e.g. there wasn’t anyone in the room just now. (anyone –anybody)
 
        一般過去時(shí)態(tài)疑問結(jié)構(gòu):簡單提一下:
e.g. we met him last month. – did you meet him last month?
e.g. he was out. – was he out?
e.g. he wasn’t out yesterday.—wasn’t he out yesterday?
 
練習(xí)與體會(huì):
2004年理工hurricanes(颶風(fēng)))
(1)did you know(知道) that before 1950, hurricanes(颶風(fēng)) had(有) no names(名字)? (2)they were simply(僅僅) given(被給出的) numbers(數(shù)字). (3)the first names(颶風(fēng)的首名) were simply alpha, bravo, charlie, etc. (4)but(女性的) names were given(被給與)because of(因?yàn)椋?the unpredictability (不可預(yù)知) factor(因素) of the storms(暴風(fēng)雨). in 1953, female
 
ⅲ、一般將來時(shí)
1. 形式
第一人稱后接:“shall+動(dòng)詞原形”
第二、三人稱后接:“will+動(dòng)詞原形”
注:在美國英語中第一、二、三人稱都用“will +動(dòng)詞原形”
 
2. 基本用法:
用在表示將來的動(dòng)作或狀態(tài):shall/will + v. (將…)
e.g.they will win(贏). 我們將會(huì)贏的。
e.g. he will let (讓) you know(知道). 他將會(huì)讓你知道的。
〔主語為第一人稱時(shí)〕一般將來時(shí)態(tài)常翻譯為“要,想要, 將要, 打算要”
e.g. we shall (will) go(去) to (往) nanjing tomorrow(明天) morning. 我們明天早上要去南京。
e.g. we will/shall invite(邀請(qǐng))you to our party(宴會(huì)). 我們想邀請(qǐng)你參加我們的宴會(huì)。
e.g. i will/shall be a good boy(孩子). 我要做一個(gè)好孩子。
 
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