1. Comparing two things:
* Unlike her brother, who loves sports, Sarah prefers reading and writing.
* The weather today is unlike yesterday, with sunshine replacing the rain.
2. Expressing contrast:
* Unlike most other mammals, bats are the only ones that can fly.
* Unlike the old building, the new one has a modern, sleek design.
3. Emphasizing a difference:
* Unlike the previous model, this one has a touchscreen display.
* Unlike the rumors, the company is actually doing very well.
4. With a prepositional phrase:
* Unlike with other animals, it is difficult to predict a cat's behavior.
* Unlike in the past, we now have access to information at our fingertips.
5. In a negative comparison:
* Unlike him, I don't enjoy spicy food.
* Unlike the others, she didn't finish the race.
Remember, "unlike" is used to emphasize a difference between two things or to make a contrast. It is often followed by a noun or pronoun, or a prepositional phrase.