21. -> It is such a small shop that we don't take notice of it. 

Cấu trúc: S + (be) + such + a/an/the + adj + noun + that + clause. : quá đến...nỗi mà

22. It was such a nice day that all of us went out for a walk. 

Giải thích cấu trúc như câu 21. 

23.  It is so busy that I can't go to my friends's birthday party. 

Cấu trúc: S (be) + so + adj/adv + that + clause. : quá đến...nỗi mà. 

24. My mother is so ill that she can't go to work today. 

_____________________________________
@Shelly08 

#Nghi

`1.` It is such a small shop that we don't take notice of it. 

`2.` It was such a nice day that all of us went out for a walk. 

`3.` I am so busy that I can't go to my friends's birthday party. 

`4.` My mother is so ill that she can't go to work today. 

`@` Kiến thức :

`-` It + Be/V + such + (a/an) + (adj) + N(s) + that + S + V +O: Quá... đến nỗi mà...

`-` S + Be/V + so + adj/ adv + that + S + V+O: Quá... đến nỗi mà...