I always eat when I'm hungry. My dog is thirsty. It always drinks when it's thirsty. I'm listening to the radio. One problem for students is to know when and how to use prepositions with verbs.
Some verbs require specific prepositions.
Let's review a few verbs and learn some prepositions. I'm listening to the radio. She's writing to her mother. Learners often make mistakes because they forget the prepositions. It isn't possible to say, for example, I'm waiting my wife .