8. Vimalwill not post many letters to his friend. 9. Did you draw a picture last week?
10. He hurt me a lot in 2019.
11. Willshe bring a camera tomorrow?
12. They painted a beautiful car last year.
13. Shall I eat this mango?
14. My mother did not punish me.
15. Ravi sang many songs last month.

Incomplete question. I inferred you meant knowing which word (s) in the sentence has a preposition.

Explanation:

Remember,  a preposition is a word or group of words used in a sentence to show time, place, or location/position. It is usually placed before a noun, pronoun, or noun phrase. For example, words like "in," "on," "of," and "to," "last," are commonly used.

The preposition in the sentence is underlined and bolded, where there is no preposition (#NA ) is written:

Vimalwill not post many letters to his friend.Did you draw a picture last week? He hurt me a lot in 2019. Will she bring a camera tomorrow? They painted a beautiful car last year. Shall I eat this mango? (#NA )My mother did not punish me.  (#NA )Ravi sang many songs last month. (#NA )

Some cultural backgrounds have different superstitions or customs, this can play a part in how they decide things. superstitions are important to a culture for example, an asian culture has a superstition about women putting their purses on the ground their money will be gone, therefore people in that culture try everything they can to not let their purse touch the ground in fear of it being true. also like how we avoid walking under ladders in fear of bad luck. customs may also play a key role a custom also know as a tradition, is something people in the culture have been doing for generations as a quick example, if a family has a necklace that the family's mother passes it on to her daughter in so on it's a custom in that family.