There are plenty of free resources for studying English in your own time.

You can check free online resources (websites and apps) and courses available through your local library.

See the examples of the websites below:

Beginners (For adults with a basic speaking capability in English)

Activities for ESL Students (Grammar, Vocabulary and Bilingual Quizzes)- http://a4esl.org/

Cambridge University Learning English (Grammar, Vocabulary, Reading and Interactive Games) – https://www.cambridgeenglish.org/learning- english

Dave’s ESL Café (Grammar and Vocabulary) – https://www.eslcafe.com/resources/grammar-lessons/

Easy World of English (Grammar, Sounds/Phonics, Reading and Word Images) – https://easyworldofenglish.com/

Intermediate 

BBC Learning English Online (Grammar, Vocabulary, Quizzes, Reading, Spelling and Sounds/Phonics) https://www.bbc.co.uk/learningenglish/

 Cambridge University Learning English – (Grammar, Vocabulary, Reading and Interactive Games) https://www.cambridgeenglish.org/learning- english

Cambridge University Ventures 1 Programme – https://www.cambridge.org/us/esl/venturesadulted/venturesarcade/

(Grammar, Vocabulary, Spelling and Sounds/Phonics)

Easy World of English – https://easyworldofenglish.com/

(Grammar, Sounds/Phonics, Reading and Word Images).

Oxford University Press Online (Adult Learners) – https://elt.oup.com/learning_resources/courses/adultlearners/?view=Standard&cc=gb& selLanguage=en

(Grammar and Vocabulary)

Cambridge University Learning English – https://www.cambridgeenglish.org/learning- english

(Grammar, Vocabulary, Reading and Interactive Games)

Cambridge University Ventures 1 Programme – https://www.cambridge.org/us/esl/venturesadulted/venturesarcade/

(Grammar, Vocabulary, Spelling and Sounds/Phonics)

Oxford University Press Online (Adult Learners) – https://elt.oup.com/learning_resources/courses/adultlearners/?view=Standard&cc=gb& selLanguage=en

(Grammar and Vocabulary)