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(2) It is not until… that… 表示“一 … 就 …” 的 結(jié)構(gòu): hardly/scarcely…when/before, no sooner…than 和 as soon as 都可以表示“一 …就 …” 的意思,例如: I had hardly / scarcely got home when it began to rain. I had no sooner got home than it began to rain. As soon as I got home, it began to rain. 注意:如果 hardly, scarcely 或 no sooner置于句首,句子必須用倒裝結(jié)構(gòu): Hardly / Scarcely had I got home when it began to rain. No sooner had I got home than it began to rain. The end! Good bye! 。 Not until the early years of the 19th century did man know what heat is. 直到 19 世紀(jì)初,人類才知道熱能是什么。 注意:否定句可用另外兩種句式表示。 ( 2) Until when 疑問句中,until要放在句首。 ( 1) Until可用于句首,而 till通常不用于句首。 I didn39。 Don39。t arrive until 6 o39。 (在肯定句中可用 before代替 Let39。 肯定句: I slept until midnight. 我一直睡到半夜時(shí)醒了。動(dòng)詞為延續(xù)性或非延續(xù)性都可 以??隙ㄐ问奖硎镜囊馑际?做某事直至某時(shí) ,動(dòng)詞必須是延續(xù)性的。 As the day went on, the weather got 天過去,天氣越變?cè)綁摹? Just as / Just when / When I stopped my car, a man came up to me. ( 2)當(dāng)從句的動(dòng)作發(fā)生于主句動(dòng)作之前,只能用when 引導(dǎo)這個(gè)從句,不可用 as 或 while。re given. 囚犯?jìng)冎荒芙o什么吃什么。(Whatever you say是主語從句 ) (錯(cuò)) Prisoners have to eat no matter what they39。ll make a trip even though the weather is bad. (4) whether…or 不管 …… 都 Whether you believe it or not, it is true. (5)“no matter +疑問詞” 或“疑問詞 +后綴 ever” No matter what happened,