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e classroom. ? While the students were talking, the teacher came into the classroom. while VS when ? when, while這兩個詞都可以引出時間狀語從句,它們的差別是: when 從句表示某時刻或一段時間 ; while 只表示一段時間。 ? . ? When he left the house, I was sitting in the garden. ? 當(dāng)他離開家時,我正在院子里坐著。 ? When he arrived home, it was just nine o39。clock. ? 當(dāng)他到家時,正是九點鐘。 ? While he was in London, he studied music. ? 當(dāng)他在倫敦時,他學(xué)習(xí)音樂。 ? While she was typing the letter, the telephone rang. ? 當(dāng)她在用打字機打那封信時,電話響了。 so that VS so… that… ? so that 以便;致使 ? Please study hard so that you can pass the final exam. ? 努力學(xué)習(xí),這樣你就可以通過期末考試。 ? so …that … 如