Writing complex sentences requires skill and practice, as certain rules and conventions must be followed to avoid confusion and errors. To write complex sentences correctly, use a comma to separate the dependent clause from the independent clause when the dependent clause comes first, such as in the sentence "Because it was raining, he decided to stay home". When the dependent clause comes after, no comma is necessary. Subordinating conjunctions, like because, although, if, or when, should be used to introduce dependent clauses and show their function and connection to the independent clause. Additionally, relative pronouns like who, which, or that should be used to introduce dependent clauses that modify a noun or pronoun in the independent clause. Following these tips will help you write complex sentences accurately.