1. impression n.        ;        ;       
① Lin Dan, the champion of men’s badminton in the 16th Asian Games, made a deep impression on us all.
② What’s your impression of her?
③ The teacher has a good impression of the smart boy.
④ I was under the impression that we would have a good holiday, but it’s been raining these days.
Conclusion: make an impression on sb.                            
have / get a good impression of sb.                       
under the impression that…                           
impress: v.            ;            
① He impressed us with his sincerity.
② Father impressed the importance of hard working.
③ I was impressed by/ at / with the movie.
impress sb. with sth.                  = impress sth. on sb.                       
be impressed by / at / with sth.