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‘deteriorate’ (verb, formal) does not take an object (it is intransitive)

You can say:

‘The situation deteriorated’. (subject + verb)

But you cannot say:

‘I deteriorated the situation’.  (subject + verb + object)

‘This deteriorated the environment’ (subject + verb + object)

(you can say ‘I made the situation worse’ ‘This will destroy/harm the environment).

Good examples for IELTS:

Air quality is rapidly deteriorating in our cities.

Living conditions here have seriously deteriorated in the past few years.

Get lots more examples here.

Common Mistakes

1. This problem has severely deteriorated my health.*


  • My health has seriously deteriorated due to this problem.

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