Which term refers to chunks whose parts never change and are used as fixed phrases?

• A. Fixed Expression
• B. Semi-Fixed Expression
• C. Collocation
• D. Word

Answer: (A)

Fixed expressions are chunks of language that function as a single fixed unit with their form unchanged. They’re learned and used as whole phrases rather than being built word by word, so the sequence and the exact words stay the same each time you use them. This is why a phrase like “by the way” or “as a matter of fact” feels like a single unit you memorize, not something you freely assemble from individual words. In contrast, semi-fixed expressions allow small changes or have slots to fill, and collocations are natural word pairings that can vary in form or tense but still co-occur regularly. A single word isn’t a chunk of fixed form, so it doesn’t fit the idea of a fixed expression.