Помогите Пожалуйста

Помогите Пожалуйста
Present Perfect
1. He cant cal his friend, because (he, to lose, his notebook).
2. My mother cant wear her dress, because (she, not to finish, it).
3. Mr. downey cant read the newspaper, because (the postman, not, to deliever it).
4. Mrs. Wolff cant do anything, because (she, to learn, just, about her sons illness).
5. She cant cook dinner, because (she, to cut, her finger).
6. I cant write to my friend, because (I, to lose, his address).