Write It Right: a Little Blacklist of Literary Faults — книга для чтения (C1)

Every for Ever. "Every now and then." This is nonsense: there can be no such thing as a now and then, nor, of course, a number of now and thens. Now and then is itself bad enough, reversing as it does the sequence of things, but it is idiomatic and there is no quarreling with it. But "every" is here a corruption of ever, meaning repeatedly, continually.

Ex. "Ex-President," "an ex-convict," and the like. Say, former. In England one may say, Mr. Roosevelt, sometime President; though the usage is a trifle archaic.

Example for Problem. A heritage from the text-books. "An example in arithmetic." An equally bad word for the same thing is "sum": "Do the sum," for Solve the problem.

Excessively for Exceedingly. "The disease is excessively painful." "The weather is excessively cold." Anything that is painful at all is excessively so. Even a slight degree or small amount of what is disagreeable or injurious is excessive—that is to say, redundant, superfluous, not required.

Executed. "The condemned man was executed." He was hanged, or otherwise put to death; it is the sentence that is executed.