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#Errores comunes
53 lessons about errores comunes in English, explained in Spanish. Practice with exercises and download worksheets.
- A1Grammar 14 min
Possessive Pronouns
Learn possessive pronouns (mine, yours, his, hers, ours, theirs): how they differ from possessive adjectives and when to use each.
View lesson - A1Grammar 20 min
Subject Pronouns
Subject pronouns are the words you use to say who or what is doing something, without repeating a name: I, you, he, she, it, we, they...
View lesson - A1Grammar 13 min
Irregular Plurals
Learn the most common irregular plurals in English: children, men, women, feet, teeth, people, and words that never change like fish and sheep.
View lesson - A1Grammar 12 min
There Is / There Are
Learn there is (for one thing) and there are (for several): when to use each, the contraction there's, and how uncountable nouns work.
View lesson - A1Grammar 14 min
Possessive 's
Learn the possessive 's: owner + 's + thing (Mary's car). When to use just 's, when to use only an apostrophe, and how it differs from the contraction of is.
View lesson - A1Grammar 20 min
Verb To Be: Affirmative
The verb to be is the first verb you need to master in English. Learn when to use am, is, and are in affirmative sentences, with examples, exercises, and audio.
View lesson - A1Grammar 13 min
A vs An
Learn when to use a and when to use an: it depends on the SOUND that follows, not the spelling. Includes tricky cases like an hour and a university.
View lesson - A1Grammar 14 min
Possessive Adjectives
Learn the possessive adjectives my, your, his, her, its, our, and their: how to choose the right one and where it goes in the sentence.
View lesson - A1Grammar 14 min
The Article 'The'
Learn when to use the definite article the (something specific, unique, or already mentioned) and when to leave it out (general statements, languages, meals).
View lesson - A1Grammar 13 min
Adjectives
Learn the two golden rules for English adjectives: they go before the noun, and they never change form for gender or number.
View lesson - A1Grammar 12 min
Some vs Any
Learn the simple rule for some and any: some in affirmative sentences, any in negatives and questions, with plurals and uncountable nouns.
View lesson - A1Grammar 12 min
Have vs Has
Learn when to use have and when to use has: have with I, you, we, they, and the irregular has with he, she, it.
View lesson - A1Grammar 12 min
Is there / Are there
Learn to ask questions with is there and are there: flip the word order, choose singular or plural, and answer with short answers.
View lesson - A1Grammar 12 min
Present simple: affirmative
Learn the present simple with I, you, we, and they: the verb stays in its base form, used for routines, habits, and general facts.
View lesson - A1Grammar 12 min
Adjective Order
Learn the order for stacking adjectives in English: opinion, size, age, color, then the noun. A big red car, never a red big car.
View lesson - A1Grammar 12 min
This / that / these / those
Learn the demonstratives this, that, these, and those: near vs far, singular vs plural, plus negatives, questions, and short answers.
View lesson - A1Grammar 14 min
Can: ability
Learn can and can't for abilities: no -s with he/she/it, no to before the verb, and how to ask and answer with short answers.
View lesson - A1Grammar 12 min
Do/Does and Don't/Doesn't
Review do, does, don't, and doesn't together: one single rule based on the subject that ties questions and negatives together.
View lesson - A1Grammar 12 min
Adverbs of frequency
Learn always, usually, often, sometimes, rarely, and never: what they mean and, most importantly, where to place them in a sentence.
View lesson - A1Grammar 14 min
Object Pronouns
Learn the object pronouns me, you, him, her, it, us, them: how they differ from subject pronouns and where they go in the sentence.
View lesson - A1Grammar 13 min
Regular Plurals
Learn the three spelling rules for regular plurals in English: add -s, add -es, and change y to -ies.
View lesson - A1Grammar 14 min
Imperative
Learn the English imperative: the base verb with no subject for commands, instructions, and requests, plus the negative with Don't.
View lesson - A1Grammar 14 min
Will (affirmative)
Learn will for predictions, on-the-spot decisions, and promises, with its contraction 'll.
View lesson - A1Grammar 12 min
There isn't / aren't
Learn how to negate there is and there are: there isn't for one thing or uncountables, there aren't for several, plus the word any.
View lesson - A1Grammar 13 min
Present simple: third person
Learn the present simple third person rule: add s to the verb with he, she, it, plus the spelling patterns for es and ies endings.
View lesson - A1Grammar 12 min
Present simple: negative
Learn to make present simple negatives with do not and does not, and why the verb drops its s in the negative form.
View lesson - A1Grammar 12 min
Present simple: contractions
Learn don't and doesn't, the short forms of do not and does not: when to use each and why the apostrophe replaces the o.
View lesson - A1Grammar 12 min
Present simple: questions
Learn to ask present simple questions with do and does: word order, when to use each, and how to answer with short answers.
View lesson - A1Grammar 14 min
Prepositions of place
Learn the rule for in, on, and at plus common relative prepositions like next to, between, under, and behind.
View lesson - A1Grammar 14 min
Prepositions of time
Learn in, on, and at for time: in for months/years/seasons, on for days and dates, at for exact hours, plus the at night exception.
View lesson - A1Grammar 13 min
Prepositions of movement
Learn prepositions of movement: to, from, into, out of, up, down, across, through, around, and towards, with real direction examples.
View lesson - A1Grammar 14 min
How much / How many
Learn when to use How many (plural countables) and How much (uncountables and prices), plus how to answer naturally.
View lesson - A1Grammar 15 min
Present simple vs continuous
Learn the difference between present simple and present continuous, the time markers for each, and stative verbs that never take -ing.
View lesson - A1Grammar 13 min
Would like
Learn would like for polite requests, the difference between would like and like, negatives, questions, and short answers.
View lesson - A1Grammar 15 min
Wh questions
Learn the six Wh words, what they ask for, and how to build a correct Wh question with the right auxiliary.
View lesson - A1Grammar 15 min
Quantifiers
Learn much, many, a lot of, a few, and a little, and how countable and uncountable nouns decide which one to use.
View lesson - A1Grammar 15 min
Was and Were
Learn was and were, the past of the verb to be, plus the negatives wasn't/weren't and how to ask questions.
View lesson - A1Grammar 15 min
There was / There were
Learn there was and there were, the past of there is/there are, plus negatives and questions.
View lesson - A1Grammar 15 min
Regular verbs -ed
Learn how regular verbs form the past with -ed, the spelling rules, and the three ways -ed is pronounced.
View lesson - A1Grammar 14 min
Have got vs have
Learn the difference between have got and have for possession, when to use only have (past, future, actions), and British vs American usage.
View lesson - A1Grammar 14 min
Comparatives
Learn how to form comparatives with -er and more, when to use than, and the irregular comparatives (better, worse, farther).
View lesson - A1Grammar 15 min
Irregular verbs
Learn the 20 most common irregular verbs in English and how to use them to talk about the past.
View lesson - A1Grammar 13 min
Like + -ing
Learn like/love/hate/enjoy + -ing, the spelling rules for -ing, negatives with don't/doesn't, and questions with Do/Does.
View lesson - A1Grammar 14 min
Countable / uncountable
Learn the difference between countable and uncountable nouns, many vs much, and how to count uncountables with units like a glass of.
View lesson - A1Grammar 13 min
Can: permission & requests
Learn to use Can I and Can you to ask for permission and favors, and how to sound more polite with please and could.
View lesson - A1Grammar 14 min
Present continuous: affirmative
Learn the present continuous affirmative: am/is/are + verb-ing, the spelling rules for -ing, and the three main uses.
View lesson - A1Grammar 13 min
Present continuous: negative/questions
Learn to negate and ask questions in the present continuous: add not after am/is/are, flip the order to ask, and short answers.
View lesson - A1Grammar 13 min
Have got
Learn have got for possession: the 7 contractions, the negative (haven't got/hasn't got), questions, and short answers.
View lesson - A1Grammar 14 min
Superlatives
Learn how to form superlatives with the + -est and the most, when to use in and of, and the irregular superlatives.
View lesson - A1Grammar 14 min
Going to (negative/questions)
Learn the negative and question forms of going to, wh- questions, and short answers.
View lesson - A1Grammar 15 min
Going to vs Will
Learn when to use going to (decided plans, evidence) versus will (on-the-spot decisions, opinions, promises).
View lesson - A1Grammar 12 min
Conjunctions
Learn the five essential conjunctions: and, but, or, because, and so, and how to connect two ideas naturally.
View lesson - A1Grammar 12 min
Let's
Learn Let's for suggesting an activity together, the negative Let's not, natural ways to accept or decline, and common mistakes.
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