This watch/one/cheap/you can buy

=> This watch is one of the cheapest watches you can buy.

It/bad/mistake/I/ever/make

=> It was the worst mistake I have ever made

* Ta có cấu trúc: S+ tobe+ the+ most+ adj/ adv.

* Ngoại lệ: Bad-> Worse-> Worst

* Trong câu (2) có cấu trúc thì HTHT: S+ have/ has+ V-ed/ PII (vì có ''ever'')

$#Jade$

`@` Superlative form :

`1.` With short adj

S `+` be `+` the `+` short adj `-` est ....

`2.` With long adj

S `+` be `+` the `+` most `+` long adj ....

`@` Present Perfect : S `+` have`//`has `+` Ved/c3

`@` Answer :

`1.` This watch is one of the cheapest watches you can buy.

`2.` It is the worst mistake I have ever made.