Turn the root word into the right form — like happy into happiness — to complete each sentence in this free online word-formation game. It builds prefixes, suffixes and word families, with items graded from CEFR Pre-A1 to B1 for elementary and intermediate ESL learners.
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How to Play Word Formation
Word Formation is a free online English game that builds your knowledge of word families.
You’re given a root word and you change it into the correct form to complete the sentence — for
example, turning happy into happiness or care into careful.
Step by step
- Read the sentence and find the gap.
- Look at the root word provided.
- Work out what form is needed — noun, adjective, adverb or verb.
- Add the right prefix or suffix to form the correct word.
- Score a point for each correct transformation.
Tips to form the right word
- Decide the part of speech first — the words around the gap tell you what’s needed.
- Learn common endings: -ness and -ment (nouns), -ful and
-ous (adjectives), -ly (adverbs). - Watch for spelling changes, like happy → happiness.
Who it’s for
Items are graded from CEFR Pre-A1 to B1, so Word Formation suits elementary and
lower-intermediate learners and supports exam-style “use of English” practice.
More grammar games:
Games Hub ·
Gap Fill ·
Grammar Snap