Simple Past vs Past Participle vs Perfect Tense - Basic English Grammar

In this video, Alisha answers 6 questions. - Could you please tell me what does the expression ""give it a try "" means? - What is the main difference between simple past and present & past participle or perfect tense? - What is the difference among ""I want you to know"",""I want to you know"",""I want you know""? - i'd like to know about 'finish' , ' has finished' 'is finished'. - Which one of them is correct in the following sentences: 1. Not all questions can't be answered by Alisha. 2. Not all questions can be answered by Alisha. - I am confused about when to use: ""I talk with blabla vs I talk to blabla"", can you help with that?