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 Understanding the passive infinitive is a key part of mastering English grammar. Here's a breakdown of its structure and usage: What is a Passive Infinitive? A passive infinitive is an infinitive verb form that indicates the subject of the sentence receives the action, rather than performing it. Structure: The basic structure is: "to be" + past participle. Examples: "to be seen" "to be helped" "to be chosen" Usage: Focus on the Receiver: The passive infinitive is used when the focus is on the person or thing that is acted upon. Example: "She wants to be invited to the party." (The focus is on "she" receiving the invitation.) After Modal Verbs: It is very common to find passive infinitives following modal verbs. Examples: "This report should be reviewed." (This could also be written "This report should to be reviewed" but more commonly the "to" is dropped after modal ver...

 Passive Voice In the active voice, the subject performs the action: "The dog chased the ball." (The dog is doing the chasing.) In the passive voice, the subject receives the action: "The ball was chased by the dog." (The ball is being chased.) Forming the Passive Voice The passive voice is formed using a form of the verb "to be" + the past participle of the main verb. Present Simple: is/am/are + past participle (e.g., The letter is written .) Past Simple: was/were + past participle (e.g., The cake was eaten .) Present Continuous: is/am/are being + past participle (e.g., The house is being painted .) Past Continuous: was/were being + past participle (e.g., The documents were being reviewed .) Present Perfect: has/have been + past participle (e.g., The car has been washed .) Past Perfect: had been + past participle (e.g., The report had been finished .) Future Simple: will be + past participle (e.g., The project will be completed .) Modal...