Question

correct any parallel - form errors. some sentences have no errors.

1. i like to dive and to go swimming when i am at the lake.
2. motorboats, canoes, and sailboats are my favorite forms of water transportation.
3. neither the weather nor the condition of the roads will delay his trip.
4. jim was trying to decide whether to be a newsman or someone who reports the weather.
5. because i expect the evening news to be interesting, i turn off boring reports.
6. the clouds are threatening, yet it seems unlikely that a rainy day will follow.
7. the day was bright; the weather was cold and crisp.
8. although they were tired, the small band of travelers pressed on into the night.
9. the barn which is old stood bravely against the wind, but the new house collapsed.
10. his rugged appearance hid the more caring side of his personality.
11. on his trip, mark was biking in seattle and then to visit relatives in idaho.
12. matts favorite summer activities are jet - skiing, fishing, and to swim.
13. at the grocery store, chuck bought tomatoes, grapes, and eggs.
14. on rainy afternoons i often read a good book, but on sunny days i play outdoors.
15. al runs to the store and then he is driving to the beach.

Explanation:

Parallel structure requires matching grammatical forms for linked items/ideas:

1. Changed "to go swimming" to "to swim" to match the infinitive "to dive".
2. Rewrote "someone who reports the weather" to "a weather reporter" to match the noun phrase "a newsman".
3. Changed "to visit" to "visiting" to match the past continuous verb form "biking".
4. Changed "to swim" to "swimming" to match the gerund forms "jet-skiing, fishing".
5. Changed "he is driving" to "drives" to match the simple present verb form "runs". All other sentences already use consistent parallel grammatical structures.

Answer:

1. I like to dive and to swim when I am at the lake.
2. (No error) Motorboats, canoes, and sailboats are my favorite forms of water transportation.
3. (No error) Neither the weather nor the condition of the roads will delay his trip.
4. Jim was trying to decide whether to be a newsman or a weather reporter.
5. (No error) Because I expect the evening news to be interesting, I turn off boring reports.
6. (No error) The clouds are threatening, yet it seems unlikely that a rainy day will follow.
7. (No error) The day was bright; the weather was cold and crisp.
8. (No error) Although they were tired, the small band of travelers pressed on into the night.
9. (No error) The barn which is old stood bravely against the wind, but the new house collapsed.
10. (No error) His rugged appearance hid the more caring side of his personality.
11. On his trip, Mark was biking in Seattle and then visiting relatives in Idaho.
12. Matt's favorite summer activities are jet-skiing, fishing, and swimming.
13. (No error) At the grocery store, Chuck bought tomatoes, grapes, and eggs.
14. (No error) On rainy afternoons I often read a good book, but on sunny days I play outdoors.
15. Al runs to the store and then drives to the beach.