Khan Academy: Introduction to Verb Aspect

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.

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...

If an action has been ongoing for some time, or was once ongoing and has since completed, we say it's in the progressive perfect aspect! Test your knowledge of this grammatical aspect.

Words like 'walk' and 'look' are regular verbs - they behave in a predictable way. But there's a whole class of words in English, called irregular verbs, that are harder to predict. David, KA's Grammar Fellow, explains.

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

Choose the appropriate form of the verb by asking yourself: 'How many things is the sentence about?'

Choose the appropriate verb tense by asking yourself: 'Does this sentence take place in the past, the present, or the future?'

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.