present perfect simple negative 17 - tutto inglese - Imparare l'inglese gratis on line

George (not/avenge) the death of his father.
Clara (not/capsize) the situation in her favour.
They (not concentrate) their attention on the history exam yet.
We (not kill) the boars.
The price of that building (not/decrease) lately.
This crisis (not/depress) my business activity since last year.
You (not/fish) since this morning.
Daniel (not/hesitate) before answering any questions.
Clement (not/copy) the phone numbers from the old agenda.
They (not/dart) a glance at Juliet.