# The plan was proved a failure.

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#### notletrest

##### Senior Member
In logic " The plan was proved a failure." is good. Is it right and why?

#### bhaisahab

##### Moderator
Staff member
In logic " The plan was proved a failure." is good. Is it right and why?

It's fine.

#### notletrest

##### Senior Member
Qian Ge-chuan, a famous Chinese scholar of English, holds in his Chinese book << A Sequence to English Difficulties Explanations >>(p.83) in 1981 that "The plan was proved a failure." is wrong. The word "was" should be omitted. Because here to prove means to turn, and is an intransitive verb. In the same way ,in the following two sentences "Great advantages are accrued from this measure." and "What will be ensued on this?" ,the words "are " and "be" should be omitted,too.
Thanks!

#### Barb_D

##### Moderator
Staff member
Remember that the space goes after the comma, not before.

The famous scholar seems to have ignored the passive aspect of "was proven/was proved."

The original sentence is fine. So is the intransitive version.

On the other hand "What will ensue on this?" is a very unnatural sentence, though better than the non-grammatical "are ensued" version.

#### kite

##### Member
Can't we say "The plan was proved as a failure"?

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#### Rover_KE

##### Moderator
Staff member
No, but you can say 'The plan was proved to be a failure'.

#### Tdol

##### Editor, UsingEnglish.com
Staff member
Qian Ge-chuan, a famous Chinese scholar of English, holds in his Chinese book << A Sequence to English Difficulties Explanations >>(p.83) in 1981 that "The plan was proved a failure." is wrong. The word "was" should be omitted. Because here to prove means to turn, and is an intransitive verb. In the same way ,in the following two sentences "Great advantages are accrued from this measure." and "What will be ensued on this?" ,the words "are " and "be" should be omitted,too.
Thanks!

It depends on the context, but prove can be used in the passive. Without any more context, I would go for the active, but this is one of the problems of looking at decontextualised language.

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