- I have a car. (BUT NOT I am having a car.)
- He has a daughter. (BUT NOT He is having a daughter.)
Have is also used to talk about medical conditions that we experience.
- I have a cold / a headache / a sore throat. (NOT I am having a cold / a headache.)
However, the form having can be used to talk about certain medical conditions that last for only a few seconds or minutes. For example, we can say:
- I am having a heart attack.
- He thought that he was having a stroke.
- He was having an epileptic fit.
When we talk about eating, the continuous form having is possible.
They were having dinner when I arrived. (Here we are talking about an activity that was in progress when another action occurred.)
- I have breakfast at 8 am. (Routine)
- I am having breakfast. (An activity that is going on at the moment of speaking)