`1`.It's a English-speaking club

`\rightarrow` Thì HTĐ ( ĐT Tobe ) : S + is / am / are + adj / n

`\rightarrow` Tính từ ghép : Noun `-` V-ing

`2`.It is very wonderful to visit Viet Nam

`\rightarrow` It is ( not ) + adj ( for O ) + to do sth : Như thế nào để làm gì

`4`.Mai said ( that ) English was her favorite subject

`\rightarrow` Câu tường thuật : S + said + that + S + V ( lùi thì )

`\rightarrow` HTĐ `->` QKĐ ( ĐT Tobe ) : S + was / were + adj / n

`@` $TLingg$

`1`, It is a speaking club .

`-` Cấu trúc danh từ ghép :

`+` N + V -ing + N

`+`  từ chỉ số lượng ( adj không thêm s) - N - N

`-` It + tobe số ít.

`2`, It is very wonderful to visit Viet Nam.

`-` Cấu trúc :

`-` V-ing + tobe is + Adj = It is + Adj + to -V

`-` V-ing đứng đầu câu làm chủ ngữ số ít, Adj + to- V.

`4`, Mai said (that) English was her favorite subject.

`-` Cấu trúc câu tường thuật : S + said that/told - O that + S ( đổi) + V lùi thì.

`-` my -> her/his

`-` is -> was.