That's why proofreading is absolutely critical in ensuring your work is perfect. But let's face it, even native English speakers are prone to silly mistakes. Teachers and instructors expect your papers to be error-free. Our online spelling and grammar checker will answer those questions and (hopefully) help you gain more confidence in your writing. Is it bad to end a sentence with a preposition? Are there hard and fast rules for when to use who, that, or which? Where do the comma and apostrophe go?Īll these questions and more can plague both amateur and professional writers. And like many others, you've probably forgotten much of what you learned. Like most people, you probably learned the basic rules of grammar in school.