All the grammar rules,
explained simply.

Where to start?

If you are new to English grammar, the essentials fit into four families: verb tenses (how to place an action in time), articles and quantifiers (a / an / the, some / any), pronouns (personal, possessive, relative) and prepositions (place, time, movement). Master these four and you already know most of the grammar you need at A1 and A2 level. The rest (modal verbs, the passive, reported speech, conditionals, phrasal verbs) comes step by step at B1 level and completes the system.

Learners most often make mistakes with the Present Perfect (it links the past to the present, and it is easy to mix up with the Past Simple), with since / for / ago, with the possessive 's (my brother's bike, not the bike of my brother), and with modal verbs (can, must, should), which never change: you say he can, not he cans. If you are not sure, start with these pages: teachers correct these mistakes more than any others.

How each page is built

All the grammar pages follow the same structure, designed for a student who is revising quickly or a teacher who hands out the PDF in class: a quick answer at the top (the rule in two sentences), then the detailed form (affirmative, negative, question) with a full conjugation example, the uses (with real-life situations), the signal words to spot (yesterday, since, by the time…), a few common mistakes with the fix, an interactive quiz to test yourself and FAQs with students' real questions.

The pages are written by the teaching team of the Big Challenge, the English contest created in 1999, which more than 5,000 students take part in every year. The common mistakes come from real answers in the contest, not from a theory list. The tone is fun with younger students and more serious with older ones, but always kind: you learn English better with confidence than under pressure. Once you understand the rule here, the PLAY app (at the bottom of each page) helps you turn it into a speaking habit.