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培养想象力，善于观察事物。面对难题，用积极的态度去解决，发挥想象力，认识世界，改造世界。
Translate the phrases.
spread to other countries
by accident
It is said …
over an open fire
fall into the water
take place
without doubt
流传到其它国家
偶然；意外地
据说…
在户外的火上
掉入水中；落入水中
发生；出现
毫无疑问；的确
阅读Grammar Focus中的句子，然后做填空练习。
被动语态 (Passive Voice)
结构: be + V-p.p.
am / are / is +动词的过去分词
was / were +动词的过去分词
一般现在时的被动语态:
一般过去时的被动语态:
Many people speak English. (主动语态)
English is spoken by many people
The naughty boy broke the window yesterday. (主动语态)
The window was broken ( by the naughty boy) yesterday.
We bought some books.
主动句与被动句之间的转换
Some books were bought ( by us )