Advice vs Advise

The words advice and advise are often confused in English. I advise you to read through this lesson so you will no longer need advice on this matter.

Apostrophe s

The English apostrophe s and s apostrophe cause a lot of problems, even for native speakers. This lesson's task is to help you learn about possessives and contractions that need apostrophes and plurals that don't.

Bad vs Badly

The English words bad and badly are often confused by English speakers. If you're one of them, don't feel bad, you won't do as badly after reading this lesson.

Bi- vs Semi-

The English prefixes bi- and semi- are often mixed up by native speakers. A semi-annual reading of this lesson will help more than a bi-annual one.

Clause vs Phrase

The grammatical terms clause and phrase are often confused by English speakers. This lesson filled with clauses and phrases will help you understand the difference.