Grammar fix
significant improvement
clear improvement
A noticeable and important positive change in something, making it much better than before.
Hear it in context
Notice where the phrase sounds natural.
There has been a significant improvement in her English since she started practicing every day.
In my opinion, the city has seen significant improvement in public transport, making it easier for people to commute.
Fix the pattern
One small grammar move makes it sound right.
Not: There was a significant improve in sales.
Say: There was a significant improvement in sales.
Use the noun 'improvement', not the verb 'improve', after 'significant'.
Which sounds natural?
Tap the one a native speaker would say.
'Significant improvement' is the natural collocation; 'amelioration' is bookish.
Build natural chunks
Words that usually travel with it.
significant improvement + in
- in performance
- in quality
- over last year
- in health