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(3)系表结构中的过去分词可被very, too, so修饰，被动语态中的过去分词须用much修饰。 The boy was too frightened to move. 这孩子吓得动也不敢动。(系表结构) He was very excited.他很激动。(系表结构) He was much excited by the news. 他听到消息后很激动。(被动结构) (5)表示“充满”意思的“be ＋ 过去分词 ＋ with”结构多为系表结构。 The mountain is covered with snow all the year round. 这座山终年被积雪覆盖。 The classroom was crowded with pupils. 教室里挤满了学生。 The lake is dotted with fishing boats. 湖里渔帆点点。 The floor was piled with old books. 地板上堆满了旧书。 (6)remain, feel, lie, stand 以及 become, grow 等词 ＋ 过去分词结构多为系表结构。 The matter remained unsettled. 这件事悬而未决。 She felt disappointed. 她感到失望。 The road became crowded. 道路拥挤了。 (7)句中有时间状语和地点状语时，一般为被动语态，反之为系表结构。 The bank is closed. 银行现在关门了。(系表结构) The bank is usually closed at six. 银行通常6点关门。(被动语态) 1. The bridge, which ________ 1688, needs repairing. A. is dated from B. was dated from C. dates from D. dated from 【分析】C 此题容易误选B或D，认为句中用了 1688 这个过去时间，所以应选过去时态，又因为 date from 不用于被动语态，所以只能选D。其实此题的最佳答案应是C，因为 date from 的意思是“自某时起存在至今”(＝have existed since)，它通常用于一般现在时，而不用过去时态(尽管其后接的总是表示过去的时间)，除非所谈论的东西现在已不复存在，如：The church, which dated from the 13th century, was destroyed in an earthquake two years ago.(那座教堂是13世纪建成的，两年前在一次地震中被毁了。) 注意：与date from同义的 date back to 也有类似用法。 2. — Do you like the material? | 
