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e up, it was eight o’clock. √ While he woke up, it was eight o’clock. When I was waiting for a bus, I met her. √ While I was waiting for a bus, I met her. √ ◆ before表示主句的動作發(fā)生在從句之前。如 : I won’t tell you the truth before he es back. 他回來之前我是不會告訴你事實的。 ◆ after表示主句的動作發(fā)生在從句的動作之后。如: After she finished the work, she went to have supper. 她完成工作后去吃晚飯了。 ◆ as soon as表示主句的動作緊隨從句動作之后發(fā)生的。表示“一 …… 就”。如: I will call you as soon as I arrive home. 我一到家就給你打電話。 I hope to find him as soon as possible. 我希望盡可能快地找到他。 Mother became unhappy as soon as I mentioned his name. 我一提到他的名字,母親就變得很不開心。 ◆ until( till) 在肯定句中,常與延續(xù)性動詞連用,意為“到 …… 為止”;在否定句中,常與表示瞬間性動作的動詞連用,意為“直到…… 才”,這時 till 和 until可以與 before 替換。如: Last night I waited until eleven o’clock, but he didn’t return. 昨天晚上我一直等到 11點 , 但他還沒回來。 My son won’t e home until it is dark. 我兒子不到天黑不回家。 ◆ since可 引導(dǎo)時間狀語從句, 意思是“自從 … 的時候起;從此;從 … 以來; … 以后”等。 1) 若 since引導(dǎo)的狀語從句的謂語動詞是 終止性動詞 (如 go, e, leave, start, begin等 )的過去時 , 則從句表示的時間是“從該動作開始的那一時刻起”。這是最常見的一種用法。如: He has studied very hard since he came to our school. 自從來到我們學(xué)校, 他學(xué)習(xí)就非常努力。 2) 若 since引導(dǎo)的狀語從句的謂語動詞是持續(xù)性動詞或表示狀態(tài)的靜態(tài)動詞 (如 live, stay, study, learn, smoke, be等 )的過去時 , 則從句表示的時間是“從該動作或狀態(tài)的完成或結(jié)束時算起”。如: I haven’t heard from him since he lived here. 從他不住這兒起, 我一直沒有收到他的信。 I haven’t eaten snakes since I was a student at school. =I haven’t eaten snakes since I left school. 自從我畢業(yè)后就一直沒吃過蛇。 Complete the sentences. our friends arrived, we all went to the square. 2. _______ they were watching TV, we listened to music and sang traditional songs. 3. __________ it was twelve o’clock, we all shouted “Happy New Year”. 4. We stayed there _________ she arrived. 5. He has made much progress __________ he started to learn English last month. While As soon as until since after as soon as since until while After/ As soon as Fill in the blanks using the words in the box. we’re staying with them, we’re going to spend a few days in Qingdao. 2. It’s the last day ______ the new school year begins. 3. _______ September es, it starts to get cooler. 4. We also go back to school ________ the May Day holiday is over. 5. We only have a few weeks ________ the start of the summer holidays. While before When as soon as before when, while, until, before, as soon as, after 6. Let’s enjoy ourselves ______ we go back to school. 7. __________ it’s 12 o’clock, everyone shouts very loudly. 8. ______ the weather is fine, many families go out for a walk. 9. ______ they’re waiting for the New Year, they listen to music, sing traditional songs and have fun. 10. What are you going to do _____ you finish college? before As soon as When While after 1. We went skating in the afternoon before/when the party started. 2. Until/After dinner, we joined a group of friends and we all went to the squ