In this video, we learn how words called “conjunctions” are used to join two ideas to make one complex sentence. These parts are known as "clauses" and can be either independent or dependent.

A sentence can be formed from multiple independent clauses, and could in theory go on forever! But is this really a good idea? Olivier and Gina offer us some helpful guidelines.

This video will show you, in simple terms, the difference between an independent (or "main") clause and a dependent (or "subordinate") clause. It's important to remember than a dependent clause depends on the independent clause, and does not make sense on its own.

Relative pronouns such as “who,” “which,” or “what” can link two “relative clauses.” Gina and Olivier review what we have learned and give us some final tips on studying English sentence structure.

Anna, from Cambridge University Press, explains how and when to use the Present Simple.

Anna explains when we use the present continuous, or present progressive tense and gives us some examples.

Actor Caralie Balcom from New York teaches us letters and numbers and sings the alphabet song at the top of the Empire State Building.

During this lesson, English teacher Alexander presents and explains different greetings in English and the time of day when each is used.

Watch this video featuring Alexander Pointer to learn the many ways of greeting people in English.

Alexander Pointer takes us through the conjugations of the verb "to be" in the present tense and explains how to form the contraction (otherwise known as the "short form") for each one.

Alexander is showing us contractions of the negative forms of the verb "to be".

Caralie demonstrates the use of 12 useful, everyday verbs. Do you know them all?

Common idiomatic expressions are the subject of this first of two video clips. Listen closely and then try a few of them out. Have fun and at the same time spice up your command of English!

Come and learn some English phrases in a fun and interesting way! This video will show you when and how to use them.

Rachel Weisz teaches Emma Stone an array of useful British slang words and phrases, while Stone supplies some American equivalents. This Vanity Fair video was made while the two stars were filming the film “The Favourite.”