1. My dad has went to Russia. Or
My dad hasn’t went to Russia.
2. I have touched a snake. Or
I haven’t touched a snake
3. My friends have studied English this year. Or my friends haven’t studied English this year
4. I have watched a film today. Or
I haven’t watched a film today
5. My best friend has read a Harry Potter book. Or
My best friend hasn’t read a Harry Potter book
6. My mum has flew in a helicopter. Or
My mum hasn’t flew in a helicopter