1. I prefer to play soccer with them.

2. I prefer playing soccer with them.
(Are both grammatical?)

3. I prefer spring to fall.

4. I prefer palying tennis outdoors to reading books indoors.

5. I prefer to swim rather than read a novel.

6. I prefer to swim rather than to read a novel.
(Are they all grammatical? Which one is correct, #5 or #6?)

7. I prefer to go shopping.
8. I prefer going shopping.
(Are both grammatical?)

All are grammatically correct and standard to use.

(Spelling correction needed in #4. Do you see it?)

1 IS NOT GRAMMATICAL.It should be.I prefer playing soccer with them.

1. "I prefer to play soccer with them." and 2. "I prefer playing soccer with them." - Both sentences are grammatically correct. Both forms are commonly used and generally interchangeable. However, there is a slight difference in meaning between the two.

The first sentence, "I prefer to play soccer with them," emphasizes the action of playing soccer itself. It suggests that playing soccer is the preferred activity.

The second sentence, "I prefer playing soccer with them," emphasizes the preference or enjoyment of playing soccer. It suggests that playing soccer as an activity is preferred over other potential activities.

3. "I prefer spring to fall." - This sentence is grammatically correct. It expresses a preference for the season of spring over the season of fall.

4. "I prefer playing tennis outdoors to reading books indoors." - This sentence is grammatically correct. It expresses a preference for playing tennis outdoors rather than reading books indoors.

5. "I prefer to swim rather than read a novel." - This sentence is grammatically correct. It expresses a preference for swimming as opposed to reading a novel.

6. "I prefer to swim rather than to read a novel." - This sentence is also grammatically correct, but it is less common and may sound slightly more formal. The form without the second "to" (as in #5) is more commonly used and considered more natural in everyday speech.

7. "I prefer to go shopping." and 8. "I prefer going shopping." - Both sentences are grammatically correct. Both forms express the preference for going shopping. The first sentence uses the infinitive form "to go," while the second sentence uses the gerund form "going." Both forms are commonly used and generally interchangeable.