However, the meaning can vary depending on the context. It could be:
* When I have (something) - for example, "Cuando tengo tiempo, voy al gimnasio." (When I have time, I go to the gym.)
* When I am (doing something) - for example, "Cuando tengo hambre, como." (When I am hungry, I eat.)
* When I am feeling (something) - for example, "Cuando tengo miedo, me escondo." (When I am afraid, I hide.)
To give you a more precise translation, please provide the full sentence or phrase where "cuando tengo" appears.