Each book____broken down into several units.在空白处应该填is,was,has还是have?为什么?
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Each book____broken down into several units.在空白处应该填is,was,has还是have?为什么?
Each book____broken down into several units.在空白处应该填is,was,has还是have?为什么?
Each book____broken down into several units.在空白处应该填is,was,has还是have?为什么?
填 is
Each book is broken down into several units.
每本书都被划分到特有的单元.
这是个被动不能用 has,have.这又在说一个现在的状态,用一般现在时.所以填:is.
Each book__is__broken down into several units.
每本书都被划分到特有的单元。
这是个被动句子,所以不能用 has,have。而且是表示现在的状态,用一般现在时。填:is.
Each book__is__broken down into several units
每本书都被分为几个单元。
这基本属于客观事实,所以用一般现在时;
而主语跟break down之间是被动关系,所以用被动语态;