He has gone to America Where is he

He has gone to America. Where is he now? He is in America now. 彼ってアメリカに行っちゃったよ。 He is not here.

He has gone to America. He is in America. ？ He went to America.

When do we use?

Scene 1 I’ve lost the key. I can’t open the door. What are you doing?

I’ve lost the key! I can’t open the door.

Scene 2 Don’t play video games. I have already done my homework. So I’m playing video games.

I’ve just done my homework! Now I’m free! I’ve already done my homework! So I’m playing video games.

I do my homework I ( have )( just)( done) my homework.

You finish your homework You ( have)( just )( finished) your homework.

She find her cat She ( has )( just )( found) her cat.

They have lunch They ( have)( just)( had) lunch.

I finish my work I ( have )( already)( finished) my work.

Mika write a letter Mika ( has )( already)( written) a letter.

We eat breakfast We ( have )( already )( eaten) breakfast.

She finish her work She ( has )( finished) her work (now ).

Ken go to America Ken ( has )( gone) to America ( now ).

We lose the key We ( have )( lost ) the key.