Oxford Learner's Dictionaries | Find definitions, translations, and grammar explanations at Oxford Learner's Dictionaries Oxford logo Toggle navigation Redeem Upgrade Help Sign in Dictionaries Dictionaries home English American English Academic Collocations German-English Grammar Grammar home Practical English Usage Learn & Practise Grammar (Beta) Word Lists Word Lists home My Word Lists Topics Recent additions Resources Resources home Text Checker Sign in Dictionaries Dictionaries home English American English Academic Collocations German-English Grammar Grammar home Practical English Usage Learn & Practise Grammar (Beta) Word Lists Word Lists home My Word Lists Topics Recent additions Resources Resources home Text Checker Redeem Upgrade Help TOP English English American English Academic English Collocations Practical English Usage German-English English-German English American English Enter search text NEW Learn & Practise Grammar (Beta) Practise your English grammar here for free! Learn & Practise combines clear, concise grammar explanations with quick interactive exercises to test your knowledge. Free sample content available NOW, including: present perfect past perfect possessives, and more Browse sample content Practical English Usage Practical English Usage, the indispensable guide to problems in English, is available here! Get answers to the questions that teachers and learners ask about English grammar and vocabulary. For instance: When do we use can, could, may or might? Can they and them have a singular meaning? When do you use bring and when do you use take? Go to PEU home Or redeem your code to get started Grammar terms Confused by grammatical terms? Uncountable nouns, determiners, present perfect... Look them up in our list of essential words and expressions. Go to language terminology The story behind Practical English Usage It started life over 40 years ago. Now it's sold over 2 million copies worldwide and is one of the best-loved and bestselling books for teachers and learners of English. Read the story Blog post: The declining use of modal verbs Professor of English Linguistics Bas Aarts writes about how the use of modal verbs such as must, shall and will has declined over time. Read the post Oxford English Grammar Course The three-level Oxford English Grammar Course by award-winning authors Michael Swan and Catherine Walter offers step-by-step grammar presentation and plenty of practice. Learn more Opens in a new window Opens in a new window Opens in a new window Oxford Learner's Dictionaries Browse Dictionaries & Grammar Opens in a new window Search Box Opens in a new window System Requirements Opens in a new window Contact Us Opens in a new window More from us Oxford Learner's Dictionaries API Opens in a new window English Language Teaching Opens in a new window Oxford Teacher's Club Opens in a new window Oxford Languages Opens in a new window OUP Worldwide Opens in a new window Oxford University Press is a department of the University of Oxford. It furthers the University's objective of excellence in research, scholarship, and education by publishing worldwide Privacy Policy Opens in a new window Children's Privacy Policy Opens in a new window Cookie Policy Opens in a new window Consent Management Opens in a new window Terms & Conditions Opens in a new window Accessibility Opens in a new window Legal Notice Opens in a new window English (UK) English (US) © 2026 Oxford University Press