Grammar fix
be running behind
running behind
To be taking longer than expected and therefore be later than planned.
collocation
How oftenCommon
LevelB1
Used inMostly spoken
Hear it in context
Notice where the phrase sounds natural.
I'm running behind on my assignments this week.
I sometimes run behind when I have several deadlines at once, so I try to plan the difficult tasks first.
Fix the pattern
One small grammar move makes it sound right.
Not: I'm running behind of my work.
Say: I'm running behind on my work.
Use 'behind on' for unfinished work, or simply say 'running behind'.
Don't confuse it
Other ways to say it
Be later than planned
Which delayGeneral scheduleLate arrival
be behind scheduleWork, travel, or an event is progressing later than planned.
be running behindYou're here · Conversational: your activities are taking longer than expected.
run lateOften explains why someone will arrive or finish late.