Use the present perfect to make true sentences for you. 1. write a letter in english 2. phone the emergency services 3. lose your mobile 4. forget to post an important letter 5. buy a book online 6. have a virus on your computer

1. I haven't written a letter in English.
2. I haven't phoned the emergency services.
3. I haven't lost my mobile.
4. I haven't forgotten to post an important letter.
5. I haven't bought a book online.
6. I haven't had a virus on my computer.