1. Put into passive voice. 1. They are taking a lot of actions to stop this disaster.
2. The local authorities were planning a meeting at the town hall but unfortunately
they didn't inform the people and no one came (2).
3. Who told you to leave this bag at the station?
4. They had already found the criminal by the time I came.
5. Next week we will start the work on this project.
6. You shouldn't wear these trousers to the wedding. They are worn-out

1. A lot of actions are being taken to stop this disaster.
To transform the sentence into passive voice, the subject "They" becomes the object of the verb "are taking", and the verb "are taking" changes to "are being taken". The preposition "to" remains unchanged.

2. A meeting at the town hall was being planned by the local authorities, but unfortunately, the people were not informed, and no one came.
To change this sentence to passive voice, the subject "The local authorities" becomes the object of the verb "were planning", and the verb "were planning" changes to "was being planned". The preposition "at" remains unchanged and the noun phrase "the town hall" is positioned after the verb. The pronoun "they" becomes "the people" and the active sentence is modified to include the negative verb "did not inform".

3. By whom were you told to leave this bag at the station?
To convert the sentence to passive voice, the subject "Who" becomes the object of the verb "told", and the verb "told" changes to "were told". The preposition "to" remains unchanged.

4. By the time I came, the criminal had already been found by them.
To rephrase the sentence into passive voice, the subject "They" becomes the object of the verb "had already found", and the verb changes to "had already been found". The preposition "by" is introduced before the subject "them" to indicate the doer of the action.

5. The work on this project will be started next week by us.
To transform the sentence into passive voice, the subject "We" becomes the object of the verb "will start", and the verb changes to "will be started". The preposition "on" is introduced before the noun phrase "this project". The adverb "next week" is positioned at the beginning of the sentence. The preposition "by" is introduced before the subject "us" to indicate the doer of the action.

6. These trousers shouldn't be worn to the wedding. They are worn-out.
To change this sentence to passive voice, the subject "You" becomes the object of the verb "shouldn't wear", and the verb changes to "shouldn't be worn". The preposition "to" remains unchanged. The pronoun "they" becomes "these trousers" and the active sentence is modified to include the adjective "worn-out".