beidongyutai内容摘要：
e practice(划线部分提问） knife is used for cutting thing. are grown in Shangdong. machines were made of metal. must be planted in spring. What is a knife used for? Where are apples grown ? What were the machines made of ? When must trees be planted ? Question:被动语态有否定式和一般疑问式吗。 Thinking and discussing（被动结构和系表结构区别） shop is now closed./The shop is usually closed at 8. cup was broken ./The cup was broken by the boy. is gone . The bridge is fallen. new classroom is being built in our school. is very surprised./He is much surprised at the News. 主要区别在于：被动结构表动作，系表结构表状态 ./前者有多种时态，后者只有现在时和过去时。 Drills： A: suddenly snowed while Mary ____for the bus. waiting waited big power station(。阅读剩余 0%
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