Mohammad Abdullah,

Verbs of possession and attribution:-

Possession and attribution are static actions, not dynamic ones. Verbs that refer to ownership are considered stative and do not take the continuous form. For example: 

“I have a large house.”

“She owns three cars.”

“That stereo belongs to me.”

“They have a large family.”

“He holds several postgraduate degrees.”

“She possesses a great wealth of knowledge.”

Using the continuous form:-

We often find some of these verbs used in the continuous forms, but their meanings are different and they are functioning as action verbs instead, as in:

• “You’re not holding on to the hammer tight enough!” (Hold means “to grip with one’s hands” in this context.)
• “He thinks that a ghost is possessing” (Possess means “to gain control or power over” in this context.)
• “She’s having a baby in a few months.” (Have means “to give birth to” in this context.)
• “They’re having a party next door.” (Have means “to arrange or carry out” in this context.)