The main purpose of this book is for the readers to learn to write Sanish complex sentences. “Que” is probably the most versatile and often used word in Spanish. It can be used as a relative pronoun to introduce an adjective clause to describe a noun. A magic formula = Conj. certain VERBS + QUE introducing a noun clause. A noun clause introduced by a subordinating conjunction, e.g., “lo que”, “el que”,”cual que”, “quien que” can be used as a subject of a sentence or a clause, or the object of the verb. An adverb (adverbial) clause is a dependent clause which functions like an adverb within a sentence. It expresses when, where, why, how, etc., about an action stated in the main clause is taking place. An adverbial clause can also show “purpose” or “cause and effect” e.g., así que, a fin de que, con el fin de que, para que, por que; “opposition” e.g., a pesar (de) que, mientras que, ; “condition or concession”, e.g., sólo si, aun si, con tal que, a condición de que, a menos de que, and en caso de que. Remember the eight formulas you have learned to construct a simple sentence with a preposition? In a complex sentence, instead of using an infinitive or a noun as the object of the preposition, you are using a dependent clause and stitch it to the main clause with a seemingly bigger subordinating conjunction. To recognize the subordinating conjunctions and to use the stitching technique to attach the dependent clause to the main clause, you don’t have to analyze what kind of clause it is each time you are writing a complex sentence. This way you can improve the fluency in Spanish or in English. In addition, the most often used Spanish conjunctions are also covered in this book.