This lesson defines and demonstrates the use of the future real conditional verb tense which requires the word "will" and the base form of the verb in present tense and usually includes an "if" statement. Real Player is required.

This TurtleDiary interactive video lesson [2:05] features information about verb conjugation. Practice exercises are provided to supplement this verb conjugation lesson.

This video defines conditionals, explains how to identify and write the three different types of conditional statements: factual, predictive, and speculative. It also discusses modal verbs and provides a list of them. [6:24]

A video lesson explaining the future perfect verb tense, how it is formed, and how it can be utilized within a sentence. [3:38]

This lesson goes over the main English verb tenses. This tutorial lesson shares a short screencast with the lesson's content. [7:41]

Writers make their writing clear by using verbs correctly to show when things happen. Let's practice choosing the right tense for our writing. [10:56]

Writers make conscious decisions about which verb tense to use, then use it consistently. Let's practice making sure our verb tense is consistent. [8:02]

A video [2:01] explaining how to use present tense verbs when writing about events that are happening right now.

A video [2:50] explaining how to use future tense verbs when writing about future events.

This video focuses on present progressives which describe an action in progress, or something that started in the past and is still happening. It is formed with the helping "to be" verb in the present tense and the present participle of...

Learn about progressive verb tense and how to use it properly within a sentence in this lesson. [12:39]

Verb aspect allows a speaker to give even more information about when an event took place or is going to take place. The simple aspect of a verb is the same as its past, present, and future tenses, such as 'I walked,' 'I walk,' and 'I...

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.

In this video [1:35] watch Sal work through a basic shift in verb, tense, and mood question from the SAT Writing and Language Test.

In this video [6:37] watch David work through an SAT Writing: Shift in verb tense and mood question.

How do we talk about things that are happening right now?

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.

We use the progressive aspect to express that a verb action is ongoing, as in 'I am eating.'

You use the perfect verb aspect to express when an action is completed, like 'I have done the dishes.'

We use the perfect progressive aspect to talk about an action that was once ongoing, but has since completed, like 'I had been waiting for twenty minutes.'

In this lesson, you will learn how to form past tense verbs by adding -ed. [4:13]

A tutorial explaining the simple future verb tense. Audio is available [36 secs]. It is 1 of 3 in the series titled "The Simple Future."

A tutorial explaining simple past tense. Audio is available [49 secs]. It is 1 of 4 in the series titled "The Simple Present."

A screencast [3 mins, 43 secs] explaining and giving examples of simple present tense verbs. It is 4 of 4 in the series titled "The Simple Present."