Some believe the distinctive Cockney brand of English is also in danger of dying out.

Question

using passive voice：
the distinctive Cockney brand of English is believed also in danger of dying out.
这样改可以吗？

答案是It is believed that the distinctive Cockney brand of English is also in danger of dying out

Answer 1

应该是：The distinctive Cockney brand of English is believed to be in danger of dying out.

动词say、believe、consider后面常常出现宾语从句，在改成被动语态的时候，可以把整个宾语从句作真正的主语放在后面，前面用it作形式主语，也可以把宾语从句中的主语作宾语从句的主语，这时的谓语用动词不定式的形式。
希望我能帮助你解疑释惑。

Answer 2

你那样改也是可以的。题目要求只说改被动语态。

Answer 3

题主所给复述句的主要结构是对的，只是有一点语法错误：在believed后面要用不定式，即在其后加上to be即可：

The distinctive Cockney brand of English is believed (by some ) to be also in danger of dying out.

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