Which coordinating conjunction is used for contrast with negation?

The coordinating conjunction 'denn' is used to give an explanation or reason for a stated fact or action. Therefore, in this context 'denn' is the best fit as it explains why the person couldn't sleep (because they had a lot of coffee).

• Coordinating Conjunctions

The coordinating conjunction 'denn' is used to provide a reason or explanation for the action or state described in the main clause. In this case, the desire to buy milk is explained by the fact that there is no milk at home. Note - 'weil' can also fill this role, but doesn't fit in this sentence grammatically as the verb would need to move to the end.

• Coordinating Conjunctions

The coordinating conjunction that is used to show contrast is 'aber', which means 'but'. In this example "aber" introduces a contrasting statement to "Es regnet," showing an intention to act despite the rain.

• Coordinating Conjunctions