I've made the following sentence:
I prefer doing things alone to with someone else.
Is that sentence correct? I also tried to replace that someone else with big company as follows:
I prefer doing things alone to in a big company of people.
I tried to say that If I had a choice to join to a group of people and do the things with them I wouldn't do that and do the things myself.
Is it correct ot say so?
You're using the construction
I prefer ... to ...
but the two clauses in the middle both need a similar construction (in this case, they both need a verb). In order to make the sentence correct, you would need to add a verb to the second clause:
I prefer doing things alone to doing them with someone else.
It's a little more wordy, but conveys the meaning much better and more correctly.
I prefer doing things alone to with somebody else.
The sentence doesn't sound natural; you can rephrase it as follows:
I prefer doing things alone to doing (them) with somebody else. Alternatively, it will sound more easy on the ear if you say:
I prefer doing things alone rather than with somebody else. Please look up the word prefer under translations - The Free Dictionary.
Moreover, in informal English, you can say:
I do things alone rather than with somebody else.
