English has two verbs, "to do" and "to make," that are both equivalent to a single verb in some languages*, which makes it difficult for speakers of those languages to know which one to use in any given situation. Understanding the difference in meaning is key to knowing which verb you need. 
What's the difference between yours and your's? There's an incredibly simple way to avoid this potential mistake. 
Learn English online with a humorous story, personalized lessons, and daily study reminders.
Who knows the difference between who's and whose? Here's a lesson whose time has come. 
Learn and listen to English online with a variety of videos for all levels. The first two weeks are free.
Aprenda y escuche inglés por internet con una variedad de videos para todos los niveles. Las dos primeras semanas son gratis.
Apprendre et écouter l'anglais sur internet avec une variété de vidéos pour tous les niveaux. Les deux premières semaines sont gratuites.
The words loose and lose are mixed up in writing; for some reason, many people write loose when they really mean lose. But there's no reason to lose your mind worrying about this, just lose the extra o! 
One of the more notable differences between English as it is spoken in different countries is in the spelling of word endings, and the British spelling is nearly always closer to the French. 
What's the difference between their, there, and they're? They're really not that complicated; once you understand their differences, there shouldn't be any more confusion. 
The English verbs imply and infer are often confused by English speakers. That's not to imply that you're one of them, but if that's how you infer it, go ahead and read this lesson. 
What's the difference between ours and our's? 
What's the difference between borrow, lend, and loan? Two of them are synonyms and the third is the opposite - lend me your eyes and I'll tell you about them. 
The English verbs lay and lie are commonly confused by even native English speakers. I'm not lying when I say that you can now lay your fears of not knowing the difference to rest. 
The English words good and well are often confused by native and non-native speakers of English - this is a good lesson that will put you well on your way to understanding the difference. 
Mistakes made with the English pronouns I and me have been increasing exponentially for years. The difference is actually very simple - let me explain it to you. 
These two English words are very often used incorrectly by native speakers. It's important that you understand the difference. 