Simple Instructions:
* First, open the package carefully.
* First, gather all the necessary ingredients.
* First, turn on the computer and log in.
Multi-Step Instructions:
* First, wash your hands thoroughly. Then, prepare the ingredients. Finally, cook the meal.
* First, read the instructions carefully. Second, assemble the parts. Third, test the product.
Emphasis:
* First and foremost, listen to the instructions.
* First, be respectful of others.
Informal:
* First off, let's go get some coffee.
* First things first, we need to get this project finished.
Key Points:
* "First" typically comes at the beginning of the sentence, followed by a comma.
* It's used to introduce the first step in a sequence of actions.
* It can be used in both formal and informal contexts.