Compare these preposition phrases and “the mistakes with prepositions” post. Click on the Prepositions category over to the right.
Most common phrases here are:
at a discount, out of breath, out of control, out of date, in time, in demand, by chance, by accident, on schedule, on the road, on a diet
image from http://loveenglish.org
Preposition mistakes happen when the wrong preposition is used. For example “They reached at the airport at 6pm.” -incorrect . “They reached the airport at 6pm.” – correct.
These are typical mistakes that I hear from English students. Especially 3 and 4. 8 is ok both ways.
image from https://www.flickr.com/photos/133912735@N07/34158547833/