${1.}$ The problem is too difficult for us to solve.

→ S + V + too + Adj/Adv + (for +O) + to_V: .... quá ... để cho ai làm gì ...

${2.}$ He is a good swimmer.

→ S + V + Adv = S + Vbe (a/an) + Adj + N

${3.}$ It was such an interesting film that we would watch it many times.

→ S + V + such + (a/an) + Adj/Adv + that + S + V + O: ... quá ... đến nỗi mà

$1$. The problem is too difficult for us to solve .

`->`S + V/be + too + adj/adv + ( for sb ) + to V: quá...để cho ai làm gì...

$2$. He is a good swimmer.

`->`S + be ( a/an ) + adj + N 

$3$. It was such an interesting film that we would watch it many times.

`->`S + V + such + (a/an) + adj/adv + that + S + V: quá...đến nỗi mà...