`-` she often travels to work by motorbike 

`->` She often ride a motorbike to work

`=>` travels to work by motorbike=ride a motorbike to work: đi xe máy đến chỗ làm

`-` It is 4:30

`->` it is half past four

`=>` half past four=4:30: bốn rưỡi 

`answer`:

`1`. she often rides her bike to school.

`to` Cấu trúc là: S+ go(es)/ get(s)/ travel(s) to somewhere + by+ bike

`=>` S+ ride(s) one's/ a bike to somewhere

`2` .it is half past four

`-` giờ + thirty

`=` Half past + số giờ