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is concerned, you seem to be having a problem with tenses.’
2
You should concern more about your health.
You should be more concerned about your health.
There are far more serious things to concern about.
There are far more serious things to be concerned about.
be concerned about sth
(= be worried or anxious): The government is becoming increasingly
concerned about the rising level of unemployment.’ ‘The manager is naturally very concerned
about the recent spate of injuries.’
3
The first chapter is concerned about the disposal of nuclear waste.
The first chapter is concerned with the disposal of nuclear waste.
The first chapter concerns the disposal of nuclear waste.
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