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fall behind

B1 neutral inseparable intransitive
In simple words

To be slower than other people or than you should be.

Literal meaning: To fall so that you end up in a position behind others.

Meanings

1 A2 neutral

To make slower progress than others or than a required pace; to lose one's position in a group or competition.

"She fell behind the rest of the class after missing two weeks of school due to illness."

Grammar: inseparable
2 B1 idiomatic neutral

To fail to pay bills, rent, or debts on time.

"They fell behind on the mortgage after he lost his job, and eventually the bank repossessed the house."

Grammar: inseparable
3 B1 idiomatic neutral

To fail to keep up with work, tasks, or a schedule.

"If you fall behind on your assignments, it's very hard to catch up before the end of term."

Grammar: inseparable
Usage notes

Extremely common in academic, professional, and financial contexts. Often followed by 'with' (fall behind with payments) or 'on' (fall behind on coursework). Applies to schedules, payments, competitors, or peers.

Commonly used with

schedule payments rent work competitors peers coursework

Forms

Base
fall behind
I/you/we/they
3rd person
falls behind
he/she/it
Past simple
fell behind
yesterday
Past participle
fallen behind
have + pp
-ing form
falling behind
continuous

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Synonyms

lag behind trail fall short drop behind lose ground be behind

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