this parcel is as heavy as that one.改成比较级的形式
(确定这句没有错?）
this road is wider than that one.改写为选择疑问句
Which road is wider ,this one or that one
（Sam）is the tallest boy in our class.就括号内容提问.
Who is the tallest boy in our/ your class 是没错吖as ... as ... 与……一样

不可以用比较级改写呀，如果是：
This parcel isn't as heavy as that one .用比较级的形式就是

This parcel is lighter than that one .
/
That parcel is heavier than this one .