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Grammar Monster

Free english grammar lessons and tests.

On Grammar Monster, there are hundreds of lessons, tests, games, and word lists covering everything from basic vocabulary to tips for advanced writers. The site is packed with teaching resources, including video lessons, printable word lists, and shareable tests.

There is no log-in, and everything is free! There are a couple of ads, and that's how I fund the site. (There are no ads in the lesson content. None. Not one.) If Grammar Monster doesn't have the lesson you need, let me know – I'll write it!

Craig Shrives

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Free English Grammar Lessons

How to use must, have to and should – modal verbs video.

‘Must’, ‘have to’ and ‘should’ are similar, but they aren’t the same. Learn what these verbs mean and how to use them correctly in this free video lesson.

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English Modal Verbs Guide – Video

What are modal verbs, how can you use them, and why are they important? Find the answers to these questions in this lesson.

More English Grammar Lessons

How to improve english grammar – video.

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The Present Continuous Verb Tense – Video

How to talk about the past in english – video, how to use adjectives – video, prepositions of movement – visual vocabulary video, the present perfect verb tense – video, the verb ‘be’ – video, articles in english – 5 levels – video, fce (b2 first) reading and use of english exam part two – video.

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Welcome! I'm Elizabeth O'Brien, and I'm here to help you actually learn grammar (not just a bunch of random rules that you'll forget in a week). We'll use sentence diagrams to make it easy and fun. 

Sentence diagramming  is an effective way to learn grammar, and it's like a word game. Diagrams will help you see how words are related.

If you're a teacher, you're probably looking for ways to make teaching grammar  easy and fun. I've taught sentence diagramming to many students, and they honestly enjoyed themselves and learned grammar at the same time.

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You can teach yourself or your students with the help of our  many free online lessons , or you can use our video grammar program. It gives you a step-by-step road map and holds your hand throughout the whole process. The best part is that you'll gain confidence as you yourself learn more about language. 

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In the many pages of this website, you'll find exercises, lessons, and oodles of sentence diagrams, which, combined with that powerful brain of yours, will turn you into a grammar pro. 

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