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d B. were having C. are having D. will have 【 解析 】 考查動(dòng)詞時(shí)態(tài)辨析。句意: “教室什么時(shí)候停的電?”“今天早上,當(dāng)我們上物理課的時(shí)候?!?while意為“當(dāng) …… 時(shí)候”,強(qiáng)調(diào)動(dòng)作的持久性,因此用進(jìn)行時(shí)態(tài),又由問(wèn)句中的時(shí)態(tài)可知,用過(guò)去進(jìn)行時(shí)態(tài)。故選 B。 B Period 3 Grammar [探究 ] until 意為“直到”, 引導(dǎo) ________狀語(yǔ)從句。談?wù)撐磥?lái)時(shí),從句要用 ____________代替一般將來(lái)時(shí),主句用一般將來(lái)時(shí)。如果直到他回來(lái),我才開(kāi)始工作。 句型透視 ● 1 Do not wake me up until you finish your work. 直到你完成工作再叫醒我。 時(shí)間 一般現(xiàn)在時(shí) Period 3 Grammar 主句的動(dòng)詞為非延續(xù)性動(dòng)詞,要用否定式。用于否定句中 時(shí),一般譯為“直到 …… 才”。 He will wait for you until/till you e back. 他將等你直到你回來(lái)。 I didn39。t begin to work until he came back. Period 3 Grammar 活學(xué)活用 1. 2022益陽(yáng)改編 I didn39。t realize he was a famous scientist ________you told me. A. until B. because C. since D. so A Period 3 Grammar ● 2 It began to rain as soon as I left the house. 我剛一離開(kāi)房子,就開(kāi)始下雨。 時(shí)間 一般現(xiàn)在時(shí) [探究 ] as soon as 表示“一 …… 就 ……” ,引導(dǎo) ________狀語(yǔ)從句。 談?wù)撐磥?lái)時(shí),從句要用 ____________代替一般將來(lái)時(shí),主句用一般 將來(lái)時(shí)。 I39。ll write to you as soon as I get there. 我一到那兒,就給你寫(xiě)信。 Period 3 Grammar 2. 2022岳陽(yáng)改編 I39。ll go to visit my aunt in England ________ the summer holidays start. A. Since B. until C. as soon as D. bec