1 . He goes to work at seven-fifteen
$\text{→ He goes to work at a quarter past seven}$
2 . My room is smaller than your room
$\text{→ Your room is bigger than mine}$
or
$\text{→ Your room is bigger than my room}$
3 . No house in the street is older than this house
$\text{→ This house is the oldest one in the street}$
`#nocopy`
$Xin$ `hay` `nhất`