"left under the impression" is a correct and usable phrase in written English.
It is often used to indicate that someone has a specific understanding or belief about something. Example: After reading the article, I was left under the impression that the company's profits were declining.
But officials performed a U-turn after Cameron warned Brown that the public would be left under the impression politicians still don't "get" the need for transparency.
The Yankees were not told the exact length of the suspension, but were left under the impression it will be through the 2014 season, according to AP. Rodriguez could get a shorter penalty for violating baseball's drug agreement if he gives up the right to file a grievance and force the case before an arbitrator, according to the source.
They had all previously served in the Royal Engineers and left under the impression they were going on a Harbour Demolition Course.
That way, he'll be left under the impression that out of all the guys there, you want him and no other.
That hasn't left me under the impression they don't know the words and don't use them.
The Journal story also left readers under the impression that the full content of a document displayed on a computer screen can be captured from several hundred yards away.
The scenery is gorgeous - it has been obtained from Italy, - and there is a verisimilitude about it which almost leaves us under the impression that what we witness is reality itself.
This leaves under-motivated the claim that phenomenalism should also be faulted for failing to supply truth-makers to ground counterfactuals about sense-impressions.
I directed her attention to all of the parts of the table that were, in fact, perfect, and I guess she decided that it would have to do, because we then proceeded to move on to the specifics of her project, and when she left I was under the impression that we had passed the test.
Nonetheless, their gratuitous display by some of the largest and most respected news broadcasters has left the impression that Iran is either under nationwide martial law or experiencing a bloodbath under complete darkness.
In the Netherlands, far too many excellent female natural science students leave research, sometimes under the impression that it is impossible to combine a research career with family life.
