Topic: Interchange of Parts of Speech,

Best Answer Explained in Below-:

The question asks for the present verb form of the word "sworn." To understand this, we need to analyze the verb "swear" and its different forms in English.

"Sworn" is the past participle form of the verb "swear," used in perfect and passive tenses (e.g., "I have sworn an oath"). The verb "swear" itself is the present tense form. It is the base form of the verb, which is used when discussing actions happening currently or generally.

Looking at the options provided:
- A) "swore" is the simple past tense of "swear," indicating an action completed in the past (e.g., "I swore an oath yesterday").
- B) "swor" is not a valid form of the verb and appears to be a typographical error.
- C) "swered" is also not a correct form and doesn't exist in standard English.
- D) "swear" is the correct present tense form.

Thus, the correct answer is D) "swear," as it is the verb form used for expressing current or habitual actions. This distinction is essential for understanding verb conjugation in English.