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A complex sentence consists of a simple sentence joined with one or more dependent clauses, e.g. 'He was early for work because he caught the 7 o'clock train'. A dependent clause is a clause that is not a complete thought; therefore, it cannot stand alone as a sentence, e.g. 'because he caught the 7 o'clock train' makes you ask 'What happened?' Always try to use complex sentences in your writing: it will be more interesting than just using simple and compound sentences.
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At 9 p.m., I crawled in bed and quickly went to sleep. It was easy to do because I had worked for 10 hours today moving heavy boxes up three flight of stairs to my friend’s new apartment. Then I had to travel half an hour back to my house. I watched television for an hour and then decided to go to bed.
A whispering sound emerged about three hours since I went to bed. I woke up startled by the noise. I looked around my room to determine where the sound was coming from. I gulped. I strained to hear what the sound was. Was it whispering? Was it noise from the air conditioner? Was it an animal scratching?
After listening for ten minutes, I decided to go investigate. Tiptoeing, I crept outside my bedroom and into the hallway. The whispering was slightly louder. Then I moved toward the stairs and stepped down each step. As the sound got louder and louder, I shivered more and more. However, I knew I needed to find out who or what was uninvited to my house. Realizing the sound was coming from my family room, I entered the room and saw the television had been left on. I sighed with relief and quickly turned off the television.
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