keep up

US /kiːp ʌp/
UK /kiːp ʌp/
"keep up" picture
1.

ついていく, 維持する

to continue to be at the same level or standard as someone or something else

:
It's hard to keep up with the latest technology.
最新のテクノロジーについていくのは難しい。
She runs so fast, I can't keep up.
彼女はとても速く走るので、ついていけない
2.

続ける, 維持する

to continue to do something

:
You're doing great, keep up the good work!
よくやっている、頑張り続けて
If you keep up practicing, you'll get better.
練習を続ければ、もっと上手になるよ。