hi mam/sir, i want to ask that where to use have had in a combined form i can say?

‘Have had’ is the present perfect of ‘to have’. The first use of the "have" is as an auxiliary verb. The second use is the past participle of the verb "to have" meaning "to own, to possess".

Few sentences for instance are:

• I have just had my dinner.
• I have had many places to visit since my childhood.