keep up

keep up  {v.}

1a. Продолжаться; не останавливаться.

The rain kept up for two days and the roads were flooded.

Ср.: KEEP ON.

1b. Продолжать (что-л.); продолжать неизменно; не прекращать.

Mrs. Smith told John to keep up the good work.

The teacher asked Dick to stop bothering Mary, but he kept it up.

Ср.: KEEP AT.

2a. Поспевать за остальными.

John had to work hard to keep up.

Billy was the youngest boy on the hike, but he kept up with the others.

Ср.: CATCH UP, KEEP PACE.

Противоп.: FALL BEHIND, GET BEHIND (1).

2b. Поддерживать (что-л.) на том же уровне или с теми же показателями, или в хорошем состоянии.

The shortage of tomatoes kept the prices up.

Grandfather was too poor to keep up his house.

3. Быть/держать в курсе дела. — Обычно используется с "on" или "with".

Mary is interested in politics and always keeps up with the news.

Ср.: KEEP TRACK.