Grammar fix
gain weight
become heavier
To become heavier, usually because of eating more or exercising less.
collocationB1common
Hear it in context
Notice where the phrase sounds natural.
- I tend to gain weight easily if I stop exercising.health
- Many people gain weight when they start working in an office because they move less during the day.IELTS speaking
Fix the pattern
Pattern: gain weight
WrongI gained some weights over winter.
RightI gained some weight over winter.
Uncountable — no 's' ('weights' = dumbbells).
Patterngain weight
Use it right
Choose the version that sounds natural in speech.
'Accrued additional body mass' is clinical; 'gain / put on weight' is natural.
Build natural chunks
Words that usually travel with it.
gain weightput onsomea bit ofeasily
Don't confuse it
The opposite is 'lose weight,' which means to become lighter.