Please note that the content of this book mainly consists of articles that are available online from Wikipedia or other free sources. An adversative clause (from Latin adversus = against) is a subordinate clause that expresses a contrasting statement to the main clause. The conjunctions used are "while" or "whereas." While the concessive clause indicates a logical contradiction, this is not the case with the adversative clause. An example: While I walk, my son drives by car. However, it must be clear from the situational context that there is a contrast here; otherwise, this is a temporal clause of simultaneity. While I prefer to drive by car, my son quickly rides his bike home. This is clearly a simultaneous temporal clause due to the context.