Original sentence: “The mixer truck spins its drum to mix strong concrete for building.”
This sentence is grammatically correct, but we can make it a little clearer or simpler. Here is a short, easy explanation and some better versions:
- Subject: The mixer truck (who the sentence is about)
- Verb/action: spins (what it does)
- Object: its drum (what it spins)
- Purpose: to mix strong concrete for building (why it spins the drum)
Simple improvements you can use:
- "The mixer truck spins its drum to mix concrete for building." (shorter)
- "The mixer truck spins its drum to make strong concrete for buildings." (clearer — 'make' and plural 'buildings')
- "The mixer truck spins its drum to make strong concrete for a building." (if you mean one building)
Tip: "its" is correct because the drum belongs to the truck. "To mix" shows the reason the truck spins. If you want to be specific, say what kind of building (houses, school, road).
Recommended friendly sentence: "The mixer truck spins its drum to make strong concrete for buildings."