`1`.If you practice it regurlarly , your English will improve a lot

`\rightarrow` CĐK Loại 1 :

`-` If - clause : Thì HTĐ : S + Vs / es / không s , es

`-` Main - clause : Thì TLĐ : S + will + V

`2`.I'm looking for my diary 

`\rightarrow` Be looking for + sth : Tìm thứ gì đó

`3`.I haven't seen David since 1989

`\rightarrow` Thì HTHT ( CPĐ ) : S + haven't / hasn't + V3 / PII

`\rightarrow` Đặc điểm nhận dạng : since

`4`.Martin asked Hoa if she had some appointment

`\rightarrow` Câu tường thuật NV : S + asked + O + if / whether + S + V ( lùi thì )

`5`.Nick suggested going to the swimming pool 

`\rightarrow` S + suggested + V-ing : Gợi ý

`\text{@ TheFox}`