During dinner, the phone rang.
--->While we were having dinner, the phone rang
I walked to school in 20 minutes
---> ít took me 20 minutes to walk to school.
There are not bottle s on the self
---> There arent any bottle s on the shelf
He spent two days visiting hoi an
---> Ít took him two days to visit hoi an
The house was beautiful, so we went to buy it
--> Because the house was beautiful, we went to buy it