Soluzione del esercizio 31 di Performer B1, Vol. 2

ACTIVE

• Affirmative - Anne paints landscapes.
• Negative - Anne doesn't paint landscapes.
• Interrogative - Does Anne paint landscapes?
• Short answers - Yes, she does. / No, she doesn't.

PASSIVE

• Affirmative - Landscapes are painted by Anne.
• Negative - Landscapes aren't painted by Anne.
• Interrogative - Are landscapes painted by Anne?
• Short answers - Yes, they are. / No, they aren't.

THE PASSIVE

FORM

• Affirmative subject + be (in the different tenses) + past participle of the main verb
• Negative subject + be (in the different tenses) not + past participle of the main verb
• Interrogative (Is / Are / Am / Was / Were) + subject + past participle of the main verb
• By is used before the person / thing that does the action.

USE

• To focus on the action / object - Example: The new bridge was opened yesterday.
• When the agent is unknown, implicit or not important - Example: The missing keys have been found.
• To describe a scientific/technical process - Example: Water is heated to produce steam.
• To describe a necessary action or obligation - Example: Brown sugar must be added to the hot chocolate.
• To provide historical information or events - Example: Magna Carta was signed in 1215.
• To narrate past events or actions without emphasizing the doer - Example: Two men were caught after robbing a bank last night.
• To make announcements or notices - Example: he meeting will be held in Room 101.