A second exercise on at, on, and in, with a heavier focus on fixed expressions and idiomatic uses — phrases like on time, at most, in class, and in line where the preposition is part of a set combination. If you haven’t done exercise 1 yet, start there.
Grammar reviewAt, on, in — idiomatic and fixed expressions
Beyond the basic rules, at, on, and in appear in a large number of fixed expressions where the preposition must simply be memorized as part of the phrase.
Common expressions with AT: at work, at home, at school, at most, at first, at last, at the moment, at risk, at fault, at all
Common expressions with ON: on time, on sale, on holiday, on the phone, on the weekend, on purpose, on foot, on the way
Common expressions with IN: in class, in hospital (British), in a hurry, in the end, in line, in trouble, in love, in time, in the neighbourhood
Tricky pairs in this exercise: on time (punctual, exactly when expected) vs in time (not too late, before a deadline) at most (maximum) vs in all (in total) in hospital (British: as a patient) vs in the hospital (American, or visiting)
READY TO PRACTICE? LET’S GO!
Fill in each blank with at, on, or in.
1. The train will arrive time.✓
2. I'm not at home. I'm work.✓
3. Those runners are sale until Tuesday.✓
4. Amelia fell asleep class this morning.✓
5. Is your grandfather still the hospital?✓
6. The drive to Atlanta will take five hours most.✓
7. This is the most expensive neighborhood San Francisco.✓