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he adverbial clauses of time. 四面八方 they walked to Tian’anmen Square,they parked their bicycles After parking their bicycles, they walked to Tian’anmen Square. Before_____________ __________________________. before 在 … 之前 after 在 … 之后 + clause從句 + phrase名詞詞組 After they parked their bicycles, they walked to Tian’anmen Square (1) before 和 after的用法比較: (簡單句) (復(fù)雜句) (2) when, while和 as的用法比較: 從句動詞 意義 when while as 延續(xù)性 動詞或 短暫性動詞 延續(xù)性 動詞 延續(xù)性 動詞 主從句動作同時發(fā)生,或從句動作發(fā)生在主句動作前后 同時 發(fā)生,強調(diào)對比 同時 發(fā)生,強調(diào)伴隨狀態(tài) , “一邊 … 一邊 …”“ 隨著 … ” 主從句動作 同時發(fā)生 ,且從句動作為 延續(xù)性 動詞時,when, while, as 可以互換 使用 。 (3) until 和 not … until… 的用法比較: not…..until :“直到 …. 才 …..” (否定句,主句的謂語動詞常用 終結(jié)性動詞 。 ) until/till:“直到 …. 為止” (肯定句,主句的謂語動詞常用 延續(xù)性動詞 。 ) I won’t leave here until the rain stopped.= I will stay here until the rain stopped. 我會等到雨停了才離開這里。 He didn’t raise his head until someone called him.= He put his head down until someone called him. As soon as “一 …… 就” ,指主從句動作先后發(fā)生 . . I will ring you up as soon as I see him. As soon as he finished his homework he turned on TV. (4) as soon as 的 用法: As soon as the bell rings, the students will go into the classroom Kangkang, Michael and Darren rode to Tian’anmen Square together. _______ they parked their bikes, they walked to Tian’anmen Square. _______ they were enjoying exploring, the crowd of people became larger and larger. __________ the crowd was pushing Darren in all directions, someone stepped on his feet. _______ Darren finally pushed his way out, he couldn’t find his two friends. He was frightened and sat down on a step. He didn’t raise his head _______ Kangkang called his