I don't know how to use adobe photoshop and I want to learn how can i crop someone or something from a picture perfectly just it without the background and put it in another picture step by step please..

Just open the picture in photo shop. Select magnetic lasso from the lasso tool. Pass your mouse over the edge of the person/thing you want to remove clicking now and then. Continue this till you have reached the starting point. You will observe dots around the picture. Either cut this or move this to a new location/background. Save the (second one) and do not save the first one.

This is a quick easy way that doesn't give good results unless you know how.
1. Load up the picture into Photoshop (I assume you know how to do this)
2. There should be a tool called the magic wand: it's picture is of a magic wand... it's near the top. (If you hold your mouse of the different tools for a few seconds, you'll find what they are called)
3. Click anywhere on the person. depending on what it is set at, it will select either all of the person, too much of the person (some background included) or far more likely not enough of that person.
4a) If it has selected all of the person you are very lucky and you can just press ctrl+c to copy that person, then place where wanted.
4b) If it has selected too much of the person then you'll have to change the tolerance of the magic wand. To do this there will be, in the place that shows you the specifics of the tool there will be a place to change the tolerance. Change to a lower value.
4c) If the magic wand isn't selecting all of them. Change the tolerance up, and/or hold down shift and select other parts of the person. Holding down shift will make it so that the selection adds onto the current selection... you'll see what I mean when you do this.
5. Now you've got the person selected press ctrl+c and paste where wanted.

What I do is take the square box and use it to keep what I want in the pic then I hit Edit, Cut, Then I open new and hit paste new image in new and save it as you want.

What I do is take the square box and use it to keep what I want in the pic then I hit Edit, Cut, Then I open new and hit paste new image in new and save it as you want.

Use crop tool or you can use pen tool to mark the selection. then press Control key+Enter key. you'll find marquee around the picture. you can now cut or copy paste somewhere else.

try any photoshop tutorial sites. ... dear.

Send a copy of the picture to me!
....Or you can blend them out using the healing brush.