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13 Feb 2015

Simplified Chinese (China) Traditional Chinese (Hong Kong) Near fluent
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Question about English (US)

1.They may not concern about the price of fossil fuel.
2.They may not be concerned about the price of fossil fuel.

Why is "be concerned" future tense?
And is the first sentence wrong?

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English (US) Vietnamese Near fluent

Simplified Chinese (China) Traditional Chinese (Hong Kong) Near fluent

Simplified Chinese (China) Traditional Chinese (Hong Kong) Near fluent
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