Present perfect tense place

Answer 1

Present perfect is formed with have/has + past participle.

The past participle of place is placed. So a present perfect verb phrase would be have placed or has placed. eg

He has placed his cards on the table.

They have placed their bets.

Answer 2

The present perfect tense indicates an action that started in the past and is still relevant in the present. It is formed by using "have" or "has" with the past participle of the main verb. For example, "I have visited Paris" implies that the action of visiting Paris has occurred at some point before now.