Here is a worksheet on differentiating the use of the adverbs ironically and coincidentally. This is a full-page worksheet with a reading of two compound sentences and ten modified cloze exercises.
As with any post under the header of Common Errors in English Usage, the text that drives this document is excerpted from Paul Brians’ fine book of the same name. He has made it available at no cost on his page at Washington State University.
If you find typos in this document, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.