Necesito que me ayuden con esta tarea de ingles necesito que me expliquen por que no lo comprendo.

Tienes que poner el auxiliar del verbo HAVE y el verbo en presente perfecto:

Por ejemplo, el auxiliar de Have para él o ella es has, el presente perfecto de go es gone

En este ejercicio:

4. Where _____________ he _________ (go)?

Tienes que poner el auxiliar "has" para he (él) y el presente perfecto de go que es gone:

4. Where has he gone

Te paso las soluciones:

5. We have not left yet
6 I have needed a new car for a long time
7. Has the bus arrived yet?
8. They have brought their children with them
9. have you ever seen a shooting star
10. How long has Petra lived in Tabasco
11. My parents have been married for 30 years
12. My sister has worked in a bank for 2 months
13. I have not traveled to the United States, but I would like to go soon
14. My brother has not finished high school yet
15. My father has not gone to Yucatan in his life