A preposition tells a reader when and where something occurred as well as how it occurred. English prepositions perform so many functions that their nuances cause quite a bit of confusion. Here are a few examples of mistakes with prepositions
Incorrect: I congratulate you for your success.
Correct: I congratulate you on your success.
Incorrect: I cannot agree to you on the subject.
Correct: I cannot agree with you on the subject.
Incorrect: I agree with your proposals.
Correct: I agree to your proposals.
Incorrect: You will have to answer for your employer.
Correct: You will be answerable to your employer.
Incorrect: You must attend at the book.
Correct: You must attend to the book.
Incorrect: He is my authority on my saying so.
Correct: He is my authority for my saying so.
Incorrect: He regretted for his mistake.
Correct: He regretted his mistake.
Incorrect: He is waiting the arrival of the postman.
Correct: He is waiting for the arrival of the postman.
Incorrect: He is afraid from the thief.
Correct: He is afraid of the thief.
Incorrect: He is awaiting for his friend.
Correct: He is awaiting his friend.
Incorrect: They travel in bus.
Correct: They travel by bus.
Incorrect: She is angry at me.
Correct: She is angry with me.
Incorrect: Who is at the phone.
Correct: Who is on the phone.
Incorrect: They go to school by foot.
Correct: They go to school on foot.
Incorrect: He congratulated her for her success.
Correct: He congratulated her on her success.
Incorrect: Have you been in London?
Correct: Have you been to London?
Incorrect: Last night, I dream with you.
Correct: Last night, I dream about you.
Incorrect: It depends of the time.
Correct: It depends on the time.
Incorrect: He spoke in my behalf.
Correct: He spoke on my behalf.
Incorrect: Mary's married with a teacher.
Correct: Mary's married to a teacher.
Incorrect: Are you investing on the stock market?
Correct: Are you investing in the stock market?
Incorrect: I entered into the room.
Correct: I entered the room.
Incorrect: She loves with me.
Correct: She loves me.
Incorrect: My flights departs in 5:00 am.
Correct: My flights departs at 5:00 am.
Incorrect: They reached at the airport at 6 pm.
Correct: They reached the airport at 6 pm.
Incorrect: She doesn't listen me.
Correct: She doesn't listen to me.