Explanation

• It is known to everyone that she knows the truth.
• “knows” → “is known” because the main clause is in the present simple.
• In reporting-verb structures, It + passive verb + that-clause is a standard passive construction.
• The tense of the subordinate clause remains unchanged: she knows the truth.

Last verified on 27-09-2026

Explanation

• The vouchers were checked by the auditor.
• The active sentence is in the Simple Past Tense.
• Passive structure: Object + was/were + past participle (V3) + by + subject.
• “Vouchers” is plural, so were is used.
• Checked remains the past participle (V3).

Last verified on 13-09-2026

Explanation

Ali wrote a letter.

• The sentence usually follows the pattern: Subject + Verb + Object
• Active Voice is a sentence structure in which the subject acts.
• Ali is the subject, wrote is the verb, and a letter is the object.

Explanation

• The given sentence is in active voice; its passive form is: Subject (The suspect) + was + past participle (arrested) + by the police.
• Hence, “The suspect was arrested by the police.” is correct.

Last verified on 07-09-2026

Explanation

• Her doctor will be visited by her by 7:00 PM.
• The object “her doctor” becomes the subject in the passive voice.
• “will visit” changes to “will be visited.”
• “by her” identifies the doer of the action.

Last verified on 12-08-2026