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(1)在(當(dāng))……的時(shí)候(when)： Never get on or off a bus～it is in motion. 汽車開動(dòng)的時(shí)候千萬不要上下車。They arrived～we were having dinner. 我們正吃飯的時(shí)候，他們到了。He fell asleep～(he was) doing his homework. 他做著做著功課就睡著了。W～(I was) in Russia， I learned Russian. 我是在俄國(guó)的時(shí)候?qū)W的俄語。W～at home，he always watches TV. 在家的時(shí)候他總是看電視。W～yet a youth， he gained the first prize in English contest. 他年輕的時(shí)候就獲得過英語競(jìng)賽的第一名。He retained the consciousness of it～asleep. 他在睡夢(mèng)中對(duì)那件事仍念念不忘。〖同〗when;

(2)與……同時(shí)(at the same time as)：The children were making a snow man outside～the adults were sitting around the fire. 孩子們?cè)谕饷娑蜒┤?，大人們?cè)诳净?。W～you are sorting your things upstairs，I'll wait downstairs. 你在樓上整理東西時(shí)，我在樓下等候。He listened to music～doing his homework/driving. 他一邊聽音樂，一邊做功課/開車。

(3)而(but)： Some people waste food～others are starving. 有的人浪費(fèi)糧食，而有的人卻在挨餓。Chinese like tea～western people prefer coffee. 中國(guó)人喜歡喝茶，而西方人則更喜歡喝咖啡。Wood is a natural material，～glass is a manufactured material. 木頭是天然材料，而玻璃是人造材料?！纪絙ut，though，although;

(4)雖然(although) (fml)： W～we have different tastes in music， we are still good friends. 雖然我們的音樂愛好不同，但我們?nèi)允呛门笥?。W～the old man felt sympathy for me， he thought he could not give me much help. 雖然這位老人同情我，但他認(rèn)為他無法給我太多的幫助?！纪絘lthough，though，but