`29.` We reuse empty glass jars to store food.

`->` reuse sth: tái sử dụng cái gì

`->` to V: để làm gì

`30.` You should wash bottles before you recycle them.

`->` should do sth: nên làm gì

`->` clause + before + clause: trước khi...

`@ Tp`

`29)` We reuse empty glass jars to store food.

`->` htd: S + V(es/s/inf)

`30)` You should wash bottles before you recycle them.

`->` should + V-inf: nên làm gì

`->` S + V + before + S + V: trước khi