题目
They were really frightened when they saw that the accident was happened.B.wereC.frightenedD.sawE.happened
They were really frightened when they saw that the accident was happened.
B.were
C.frightened
D.saw
E.happened
题目解答
答案
E 句意：当他们看到事故发生时，他们真的吓坏了。happen是不及物动词，没有被动语态，此处使用主动形式表被动。故选E。
解析
步骤 1：分析句子结构
句子的主干是"They were really frightened when they saw that the accident was happened."，其中包含一个主句和一个从句。主句是"They were really frightened"，从句是"when they saw that the accident was happened"。
步骤 2：分析从句中的动词
从句中的动词是"was happened"。"happen"是一个不及物动词，表示“发生”，没有被动语态。
步骤 3：纠正错误
由于"happen"是不及物动词，不能用于被动语态，因此"was happened"是错误的。正确的形式应该是"had happened"，表示过去完成时，表示事故在他们看到之前已经发生。
句子的主干是"They were really frightened when they saw that the accident was happened."，其中包含一个主句和一个从句。主句是"They were really frightened"，从句是"when they saw that the accident was happened"。
步骤 2：分析从句中的动词
从句中的动词是"was happened"。"happen"是一个不及物动词，表示“发生”，没有被动语态。
步骤 3：纠正错误
由于"happen"是不及物动词，不能用于被动语态，因此"was happened"是错误的。正确的形式应该是"had happened"，表示过去完成时，表示事故在他们看到之前已经发生。