Question

Какие это времена и почему именно в это время? Причина употребления в этом времени?
1) 'Jane is away on holiday.' 'Oh, is she? Where has she gone?
2) I have lost my address book Have you seen it anywhere?
3) My brother is an actor. He has appeared in several films.

Answer 1

1) 'Jane is away on holiday.' 'Oh, is she? present simple данный момент глагола to be. 
Where has she gone? present perfect  - результат на настоящий момент
.2) I have lost my address book. Have you seen it anywhere? - результат на настоящий момент present perfect.
3) My brother is an actor. present simple - постоянное состояние.
He has appeared in several films. present perfect - количественный результат к настоящему моменту.