what is the proper partial quote for the following sentence? The patient states that his knee doesn't feel right when he walks

The words, that his knee doesn't feel right when he walks, is an indirect quotation and not the person's exact words. It does not need any punctuation mark except for a period at the end.

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To get the proper partial quote for the sentence "The patient states that his knee doesn't feel right when he walks," you need to select a specific portion of the sentence that reflects the patient's statement accurately.

In this case, a partial quote might be:
"The patient states that his knee...doesn't feel right when he walks."

When using a partial quote, it is important to ensure that it retains the meaning and context of the original statement while still providing a concise excerpt.