Shown vs. proved

[lost_soul]

English Grammar Error, Intermediate level

ESL/EFL Test #7 "Her latest book", question 10

They have showed to the rest of the world that they are probably the best players.

(a) They
(b) showed
(c) world
(d) probably

English Grammar Error, Intermediate level

ESL/EFL Test #7 "Her latest book", answer 10

They have shown to the rest of the world that they are probably the best players.

Correct entry: shown
The error was: (b) showed

You have found the error but your entry is incorrect.
They have proved to the rest of the world that they are probably the best players.
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Can I use "prove" here instead of "show" ??

[Yankee]

Hi lost_soul

In my opinion, proved or proven would also be OK in the sentence.

I suspect the forum software only allows one correct answer to be programmed in. (But I'm not sure about that.)

However, in this case, it should have been clear that "showed" needed to be changed to "shown" seeing as the past participle of the verb show isn't as "flexible" as it is for the verb prove.
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Amy
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ESL teacher, translator, and a native speaker of American English