How should you ask for a letter of recommendation for grad school?

When asking for a letter of recommendation for grad school, offer to make the process as easy as possible for your potential recommender by:

Giving them suggestions for the content of the letter of recommendation (e.g., sentences including relevant examples of projects and research youโ€™ve worked on that your potential recommender was involved in)
Providing them with all the background information they need (e.g., details of the programs youโ€™re are applying to)

Ask for a strong recommendation to communicate that they should say no if they can only write you a weak or generic letter.

Have you tried QuillBotโ€™s free Paraphraser? You can use it to help you write convincing statements about your suitability for the programs youโ€™re applying to.