Question

check the mistakes in these sentences that involve tenses, adverbs, and prepositions.
she has already finished her homework tomorrow.
they will be arrived by 9 pm yesterday.
i went to the park before, i come back home.
he ran quickly the street to catch the ball.
we was waiting for the bus at the stop.
she sings good at the concert last night.
they will have meeting at 3 oclock.
i visited my friend in the hospital on the weekend.
rewrite the sentences by changing the tenses and prepositions or adverbs as directed.
she walked to the store. (change to future tense, add an adverb of manner)
we visited the museum yesterday. (change to future tense, add a preposition)
he is studying for the test. (change to past tense, add an adverb of time)
they often play in the park. (change to past tense, add a preposition)
i will travel by train. (change to past continuous tense, add an adverb of frequency)
the cat jumped on the table. (change to past perfect tense, add an adverb of manner)
we are going to the beach tomorrow. (change to past continuous tense, add a preposition)
she has been waiting for the bus. (change to past simple tense, add an adverb of time)

Explanation:

1. "She has already finished her homework tomorrow." - Incorrect as present perfect 'has finished' is used with a future - time word 'tomorrow'. It should be "She will finish her homework tomorrow."
2. "They will be arrived by 9 PM yesterday." - Incorrect. 'Will be arrived' is wrong passive - future construction. It should be "They arrived by 9 PM yesterday."
3. "They will be arrived before I come back home." - Incorrect. 'Will be arrived' is wrong. It should be "They will arrive before I come back home."
4. "Went to the park before." - Incomplete sentence. It should be "I went to the park before."
5. "He ran quickly the street to catch the ball." - Incorrect preposition usage. It should be "He ran quickly across the street to catch the ball."
6. "We was waiting for the bus at the stop." - Incorrect verb form. It should be "We were waiting for the bus at the stop."
7. "She sings good at the concert last night." - Incorrect adverb form. It should be "She sang well at the concert last night."
8. "They will have meeting at 3 o'clock." - Incorrect article usage. It should be "They will have a meeting at 3 o'clock."
9. "I visited my friend in the hospital on the weekend." - Correct.

For rewriting sentences:

1. She will walk to the store slowly. (Future tense 'will walk' and adverb of manner'slowly' added)
2. We will visit the museum on a future day. (Future tense 'will visit' and preposition 'on' added)
3. He studied for the test yesterday. (Past tense'studied' and adverb of time 'yesterday' added)
4. They played in the park after school. (Past tense 'played' and preposition 'after' added)
5. I was always traveling by train. (Past continuous 'was traveling' and adverb of frequency 'always' added)
6. The cat had jumped gracefully on the table. (Past perfect 'had jumped' and adverb of manner 'gracefully' added)
7. We were going to the beach on a sunny day. (Past continuous 'were going' and preposition 'on' added)
8. She waited for the bus yesterday. (Past simple 'waited' and adverb of time 'yesterday' added)

Answer:

1. She will finish her homework tomorrow.
2. They arrived by 9 PM yesterday.
3. They will arrive before I come back home.
4. I went to the park before.
5. He ran quickly across the street to catch the ball.
6. We were waiting for the bus at the stop.
7. She sang well at the concert last night.
8. They will have a meeting at 3 o'clock.
9. I visited my friend in the hospital on the weekend.
10. She will walk to the store slowly.
11. We will visit the museum on a future day.
12. He studied for the test yesterday.
13. They played in the park after school.
14. I was always traveling by train.
15. The cat had jumped gracefully on the table.
16. We were going to the beach on a sunny day.
17. She waited for the bus yesterday.