Certainly! Here are the corrected complex sentences for each of the given examples:
1. Until everyone had a good time, the skunks didn't escape.
2. The boss demanded a lot, so his employees worked very hard.
3. The neighbors were unable to reach an agreement because their differences were too great.
4. My parents would like to turn my bedroom into a movie theater as soon as tomorrow comes.
By adding the appropriate conjunctions (like "because," "so," or "until"), we can connect the clauses in each sentence to make them complex sentences. This helps provide a clearer relationship between the ideas presented in each part of the sentence.