2019屆高考英語(yǔ)常用詞匯辨析
到你十四歲的時(shí)候,你將學(xué)會(huì)多個(gè)英語(yǔ)單詞。
at the time; at that time; at one time; at a time
at the time通常用于過去時(shí)句子中,指某件事情發(fā)生的“當(dāng)時(shí)”、“那時(shí)”。例如:
many people saw the strange thing happen at the time. 當(dāng)時(shí),許多人都看到了這件奇怪的事情的發(fā)生。
有時(shí),at the time的后面可接“of...”短語(yǔ)。這時(shí),它表示“在(某事態(tài))發(fā)生的時(shí)候”或“在……的時(shí)代”。例如:
were you in san francisco at the time of the big earth quake in 1989﹖
1989年舊金山發(fā)生地震時(shí),你在那里嗎?
it happened at the time of king alfred. 事情發(fā)生在阿爾弗雷德國(guó)王時(shí)期。
at that time 則通常指前文明確提到的某個(gè)時(shí)期、時(shí)候。通常其后不帶“of...”短語(yǔ)。例如:
in the 17th century much corn was grown in tibet and sichuan.at that time
(=at the 17th century) the land along the changjiang river was becoming very crowded.
at one time=during a period of time in the past意為“過去有一段時(shí)期”,“曾經(jīng)”。例如:
they used to be good friends at one time. 他們?cè)?jīng)是好朋友。
at a time則意為“一次”,表示一個(gè)時(shí)間單位。它常與表示數(shù)量的詞語(yǔ)連用,表示頻率。例如:
don’t speak all at once.one at a time, please. 不要同時(shí)一起說。一次只一個(gè)人說。
take the medicine three times a day and three pieces at a time. 這些藥每天服三次,每次服三粒。
at ... speed / with ... speed
at the speed of或者at ... speed,意為“以……的速度”。而當(dāng)speed被all, lightning, great等修飾時(shí),介詞應(yīng)用with。我們可用一句口訣來(lái)幫助記憶:都(all)以閃電般(lightning)大(great)的速度行駛。如:
our car was running with all speed on the expressway. 我們的車在高速公路上全速行駛。
the long march no.2 rocket sent up the satellite into space at the speed of 11.2 kilometers per second. 長(zhǎng)征二號(hào)火箭以每秒鐘11.2公里的速度將衛(wèi)星發(fā)射到太空。
b
because/since/as/for 這四個(gè)詞都是表示原因或理由的連接詞,但是as,because,since是從屬連詞,引導(dǎo)原因狀語(yǔ)從句,for是并列連詞,所引導(dǎo)的不是原因狀語(yǔ)從句,而是表示理由的對(duì)等句子,是對(duì)前面所講內(nèi)容補(bǔ)充和說明。在語(yǔ)氣上由強(qiáng)至弱依次為because→since→as→for。because引導(dǎo)的從句多置于句末,表示直接的原因或理由,表示產(chǎn)生那種結(jié)果的必然的因果關(guān)系,在回答why的提問時(shí),必須用because作答。
如:we stayed at home because it rained.因?yàn)橄掠晡覀兇粼诩依铩?
as與since引導(dǎo)的從句多置于句首,不過as表示十分明顯的原因,只說明一般的因果關(guān)系,可譯為“因?yàn)椤⒂捎凇保欢鴖ince則表示稍加分析、對(duì)方已知的原因,一般可譯為“既然”。如: