0 to be involved in doing something: --
We've caught so many people cheating we become convinced everyone is at it.
Our street was buzzing with home-improvement activities. Everybody seemed to be at it - painting, gardening, hammering, drilling.
The band has been at it for over a decade without major success.
The group should appeal to new knitters as well as those who've been at it for years.
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
We kunnen het stap voor stap voltooien, hoe lang de weg ook is en het kan niet worden voltooid, hoe kort de weg ook is, als je niet eens je voetafdruk markeert.