2019屆中考英語連詞總復(fù)習(xí)
［正］ the students must have gone home, for there is no light in the classroom.
［析］ 由for引出的原因狀語從句在使用時(shí)要注意不能將該從句置于句 首，而應(yīng)置于主句之后，并在主句與從句之間加一逗號(hào)。更要注意的是because, as, since與for 4個(gè)表示原因的連詞中because是因果關(guān)系，是最強(qiáng)的一個(gè)，而for是最弱的一個(gè)。有些語法書中干脆把for叫做并列連詞
［誤］ my brother will pass the english exam is no question.
［正］ that my brother will pass the english exam is no question.
［析］ 主語從句的引導(dǎo)詞that是不可省略的。這一點(diǎn)不要和賓語從句的引導(dǎo)詞相提并論。
［誤］ this map will show you how will you get to the hotel.
［正］ this map will show you how you will get to the hotel.
［析］ 名詞性從句作賓語從句使用時(shí)，最重要的一點(diǎn)是要用陳述語句。特別要注意的是那些使用雙賓語的動(dòng)詞，如：tell, ask, show…
［誤］ while the clock struch ten, all the lights went out.
［正］ when the clock struck ten, all the lights went out.
［析］ while是強(qiáng)調(diào)兩個(gè)動(dòng)作在同時(shí)進(jìn)行中，如：while i am doing myhomework, my father is reading a newspaper. 而這里的when是"正當(dāng)某某時(shí)刻"，"就在這一時(shí)間點(diǎn)上"，其重點(diǎn)強(qiáng)調(diào)在某一特定時(shí)刻某動(dòng)作的發(fā)生。
［誤］ while i was walking along the street yesterday, i met an old friend.
［正］ when i was walking along the street yesterday, i met an old friend.
［析］ 這里用when表達(dá)在一個(gè)動(dòng)作的進(jìn)行中，另一個(gè)動(dòng)作突然發(fā)生了。正在進(jìn)行的動(dòng)作用一進(jìn)行時(shí)態(tài)，而突然發(fā)生的動(dòng)作用一般時(shí)態(tài)。
［誤］ while i heard the bad news i felt sad.
［正］ when i heard the bad news, i felt sad.
［析］ while不能表達(dá)一點(diǎn)兒的時(shí)間，即瞬時(shí)某一時(shí)間點(diǎn)。
［誤］ after school some students play football, or others go to the library.
［正］ after school some students play football, while others go to the library.
［析］ while在此處意為"而，然而"。
［誤］ she sang when she walked along the dark street.
［正］ she sang as she walked along the dark street.
［析］ as用于句中時(shí)，其要點(diǎn)是強(qiáng)調(diào)兩個(gè)動(dòng)作的同時(shí)進(jìn)行。這里用when雖然不能講是語法上的錯(cuò)誤，但則看不出來小女孩因獨(dú)自走黑暗的街道因害怕而唱歌的心情。
［誤］ i finished my homework until twelve o'clock last night.
［正］ i didn't finished my homework until twelve o'clock last night.
［正］ i did my homework until twelve o'clock last night.
［析］ until用在句中時(shí)其含義是某一動(dòng)作一直持續(xù)到某時(shí)結(jié)束，那么句中的動(dòng)詞則一定要用持續(xù)性動(dòng)詞，如果要用瞬間，或截止性動(dòng)詞時(shí)一定要用否定句式。因截止性動(dòng)作的否定式應(yīng)看作是持續(xù)性的動(dòng)作。如離開leave是瞬間動(dòng)作，因一出門即為離開了，而不離開則是長時(shí)間的。