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as a drink. His book ，Cha Jing describes how tea
plants___ ____(grow) and used to make tea.
Tea ____ ___ (produce) in southern China.
HangZhou and Anxi___ widely___ （know) for
their tea.
Fill in the blanks with the correct form of the given wordS
was invented
is said
discover
were grown
is produced
are
known
英语动词有两种语态：
主动语态 (the Active Voice)
被动语态(the Passive Voice)
A. 主动语态表示主语是动作的执行者。
B. 被动语态表示主语是动作的承受者。
We planted the tree.
The tree was planted by us.
(1)不知道或没有必要说明动作的执行者是谁，不用by＋动作执行者短语。This watch is made in China.(
(2)强调动作的承受者，这时应用by短语。 ?
(3)做客观说明时,常采用一种被动语态句型： It’s?/?was?said?/?believed?/?reported?/?+?that?… 据说/据报道…… 如： It’s?reported?that?about?three?hundred?people?were?killed?in?this?earthquake.
不知道动作的执行者是谁。)
世界上越来越多的人说汉语。Chinese is spoken by more and more people in the world.
被动语态的构成：
be+动词的过去分词
For examples
1. The desk is made of wood.
2. The desks are made of wood.