1. Mary has not drunk Coca cola before.
It is
2.They have not cleaned the door for 2 weeks.
The last time..
They last ..
It is….
3. Peter has learned to swim for 1 month.
Peter started ..
4. They have not met their parents for 2 moths
The last time…
They last ..
It is
5. The coffee is very hot. I can’t drink it.
The coffee is
6. He is very young. He can’t understand this problem.
He is …