Answer:
Here are single words that can follow each word in the groups to form new words or phrases:
Couch:
1. Potato - Couch potato refers to a person who spends a significant amount of time sitting or lying down, typically watching television or playing video games.
2. Surfing - Couch surfing is a term used to describe the practice of temporarily staying at someone else's home, typically a stranger's, for free accommodation.
Hot:
1. Chocolate - Hot chocolate is a warm beverage made from melted chocolate or cocoa powder mixed with milk or water.
2. Potato - Hot potato refers to a situation or issue that is highly controversial or sensitive, often causing discomfort or difficulty for those involved.
Sweet:
1. Tooth - Sweet tooth refers to a person who has a strong craving for sugary foods.
2. Dreams - Sweet dreams is a phrase used to wish someone a pleasant or enjoyable sleep.
These examples demonstrate how different words can be combined with "couch," "hot," and "sweet" to form new words or phrases that convey specific meanings or concepts.