Examples of using "усовершенствовать" in a sentence and their english translations:
It can be improved.
- I want to improve my Spanish.
- I'd like to improve my Spanish.
I want to improve my French.
I want to improve my German.
I want to improve my Italian.
I want to improve my English.
I want to improve my Greek.
I wanted to improve my French.
Practice is the best way to improve your English.
If you want to master a language, you need to learn to think in that language.