Combine simple sentences to make compound/complex
Combine: The cat wears many costumes. He hates it. Conjunction: Although
Although the cat hates it, he wears many costumes.
Combine: The giraffe is munching. He's hungry. Conjunction: Since
Since the giraffe is hungry, he is munching.
Combine: The puppies will be happy. They get a treat. Conjunction: If
If the puppies get a treat, they will be happy.