Hola me podrian ayudar con unas oraciones negativas en presente perfecto?

1. - I have not worked for my uncle.

(Yo no he trabajado para mi tío)

2.

- She has not finished her homework.

(Ella no ha terminado su tarea)

3.

- We have not visited them for the last year.

(Nosotros no los hemos visitado durante el último año)

4.

- It has not rained for the last month.

(No ha llovido durante el último mes)

5.

- They have not completed the project.

(Ellos no han completado el proyecto)

6.

- I have not cooked something special for you.

(Yo no he cocinado algo especial para ti)

7.

- He has not finished reading my book.

(Él no ha terminado de leer mi libro)

8.

- You havenot invested in something revolutionary.

(Tú no has invertido en algo revolucionario).