Which sentence contains an incorrect shift in verb mood? eat the vitamin tablets, and then have dinner. wait for half an hour after dinner, and then you should have dessert. let dinner and dessert get digested, and then retire to the bedroom. once in bed, practice some breathing exercises for better blood circulation, and then go to sleep.

The sentence that contains an incorrect shift in verb mood is the second one: "Wait for half an hour after dinner, and then you should have dessert."

This sentence contains two verb moods. "Wait for half an hour after dinner" is in imperative mood. That is to say, it is a command. The second part of the sentence is not written as if it were a command. It is written as a suggestion. "[Y]ou should have dessert" is in its conditional mood. You can realize that because of the use of the auxiliary "should".

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