And even more than that about Sentences

Compound-Complex Sentences

A compound sentence contains two or more independent clauses joined by a comma and a coordinating conjunction.

A complex sentence contains one independent clause and at least one subordinate clause separated by a comma.

A complex-compound sentence contains at least two independent clauses and at least one subordinate clause.

• Before sailing to Bali, Jojo purchased new luggage, but he forgot to renew his passport.

The independent clauses:

• Jojo purchased new luggage
• He forgot to renew his passport

The subordinating clause:

• Before sailing to Bali

When writing, it is very important that you use a variety of sentences.  Think of your writing as a salad.  The more variety you have in your writing (salad), the better it tastes.  Besides, no one wants to eat plain lettuces with no dressing or fixings.