Khan Academy: Introduction to Irregular Verbs

Some irregular verbs just won't be categorized. They don't fit into neat little boxes. These are those verbs.

If verb tense allows you to control the past, the present, and the future, then aspect gives you even finer control over time. David, Khan Academy's resident grammarian, explains.

When you match up the subject of a sentence with a verb, it's called 'agreement'. Here's how it works!

Khan Academy Grammarian David Rheinstrom welcomes you to his favorite topic: the study of language, its rules, and its conventions. By understanding English - by speaking it, by writing it, by reading this very sentence - you are a...

An understanding of verb tense will make you into a TIME WIZARD, with the ability to control the past, the present, and the future - with your words, anyway.

Let's explore what verbs are, and what they do! David, KA's Grammar Fellow, explains.

The resource from Khan Academy provides information about the SAT. This resource provides an overview of the SAT Writing and Language test.

Apostrophes are great at standing in for missing letters, allowing us to shorten words. Paige and David discuss contractions and the Principle of Least Effort.

Apostrophes can help show when something belongs to someone. Paige and David explain how!

Parentheses are used to set off extra information from a sentence, show an interruption, or indicate a reference. Practice identifying their uses in this exercise!