EN
How does Onclass work? Support Online now: 473

Article / Lessons

Popular lessons

Other lessons

0
19
Russian Verbs and Pronouns
  • Russian

Russian Verbs and Pronouns

Now that you have learnt some basic Russian phrases, it is time to start forming your own Russian sentences. To do this you need to learn about Russian verbs and pronouns. This lesson will enable you to start forming short Russian sentences. When you are learning to speak Russian it is easiest to start by just using short sentences. Often you can break a long sentence into several short ones. This is a long lesson, and introduces some of the most difficult concepts in Russian. So don't worry if you need to go slowly, or it takes some time to understand at first. You can always come back and review this lesson. When you have completed this lesson you will have taken a major step forward in understanding Russian grammar.

  • Theory
  • Elementary
  • Russian
Eugeniia Klimutina
Eugeniia Klimutina
0
19
Viruses
  • Biology

Viruses

Explore the lytic and lysogenic viral replication cycles with the Amoeba Sisters! This video also discusses virus structures and why a host is critical for viral reproduction. Expand details for table of contents and further reading suggestions! This updated video replaces our older virus video

  • Video
  • Beginner
  • English
Andrei Scherbak
Andrei Scherbak
0
19
Rhythm and Meter in English Poetry
  • Literature

Rhythm and Meter in English Poetry

English poetry employs five basic rhythms of varying stressed (/) and unstressed (x) syllables. The meters are iambs, trochees, spondees, anapests and dactyls. In this document the stressed syllables are marked in boldface type rather than the tradition al "/" and "x." Each unit of rhythm is called a "foot" of poetry. The meters with two-syllable feet are - IAMBIC (x /) : That timeof yearthoumaystin mebehold - TROCHAIC (/ x): Tellmenotin mournful numbers - SPONDAIC (/ /): Break, break, break/ On thy coldgraystones, O Sea! - ANAPESTIC (x x/): And thesoundof a voicethat is still - DACTYLIC (/ x x): Thisis the forest primeval, the murmuring pinesand the hemlock (a trochee replaces the final dactyl)

  • Image
  • Pre-Intermediate
  • English
Andrei Scherbak
Andrei Scherbak
0
19
First friends
  • English

First friends

-stand up, sit down, clap, point, jump, put hand up/down -letters C and D -new words: cat, coat, dog, date

  • Theory with exercises
  • Beginner
  • English
Elizaveta Grishkova
Elizaveta Grishkova
0
19
Celestial Objects
  • Astronomy

Celestial Objects

Our universe contains an amazing array of celestial objects, sometimes referred to as celestial bodies or astronomical objects. Though most of the observable cosmos is composed of empty space, this cold, dark void that is sparsely populated by a number of astronomical objects that range from the common to the bizarre. Known collectively by astronomers as celestial objects, celestial bodies, astronomical objects, and astronomical bodies, they are the stuff that fills the empty space of the universe. Most of us are familiar with the stars, planets, and moons. But beyond these everyday celestial objects, lies an amazing collection of other wondrous sights. There are colorful nebulae, delicate star clusters, and massive galaxies. Pulsars and quasars add to the mystery, while black holes swallow up every bit of matter that comes too close. And now, the search is on to identify the mysterious, invisible objects known as dark matter. Join Sea and Sky for an intriguing journey as we discover these amazing celestial objects.

  • Exercise
  • level.starter
  • English
Andrei Scherbak
Andrei Scherbak
0
19
Derivatives: Crash Course Physics #2
  • Physics

Derivatives: Crash Course Physics #2

CALCULUS! Today we take our first steps into the language of Physics; mathematics. Every branch of science has its own way to describe the things that it investigates. And, with Physics, that's math. In this episode, Shini talks us through derivatives and how calculus helps us to understand the world around us.

  • Video
  • Elementary
  • English
Andrei Scherbak
Andrei Scherbak
0
19
Test
  • English

Test

This is an introductory class where your teacher will check the level of English

  • Theory with exercises
  • Beginner
  • English
Maria  Nekrasova
Maria Nekrasova