To fill in the correct form of the verb "to be," you need to consider the tense and voice (active/passive) in which each sentence is written. Since these sentences are in the passive voice, the structure is generally "to be" + past participle of the main verb. Let's analyze each sentence:
The book was bought yesterday.
- This sentence is in the past tense.
Tim will be invited to the party tomorrow.
- Future tense is used because the event is happening tomorrow.
This SMS was sent two days ago.
- Past tense, as it refers to an action that happened two days ago.
Food is bought every day.
- Present tense, indicating a habitual action.
The lecture was attended yesterday.
- Past tense, referring to an action completed yesterday.
Tom will be sent to the camp in a week.
- Future tense, as this action will happen in a week.
This invention was made last year.
- Past tense, since it happened last year.
The bedroom is tidied every day.
- Present tense, describing a regular action.
The statue will be opened in two weeks.
- Future tense, because it will happen in the future.
This phone was bought last year.
- Past tense, as the purchase happened last year.
The computer is used every day.
- Present tense, indicating a regular action.
Nick was asked to bring his camera yesterday.
- Past tense, referring to an action completed yesterday.
These books will be read in two months.
- Future tense, since the reading will take place in two months.
The cat was brought yesterday.
- Past tense, because it happened yesterday.
Each sentence uses the appropriate form of the verb "to be" based on the time reference and whether the action is ongoing, completed, or expected in the future.
