`1.` watches

`-` HTD : DHNB : every evening

`-` `(+)` S `+` V( s/es )

`2. ` Have you ever met

`-` HTHT : DHNB : ever

`-` `(?)` Have/Has + S + Ved/c3?

`3.` didn't spend

`-` QKD : DHNB : Ten years ago

`-` `(-)` S + didn't + V-inf

`4.` has taught

`-` HTHT : DHNB : since

`-` `(+)` S + have/has + Ved/c3

`5.` are going to fly

`-` TLG : DHNB : tomorrow afternoon

`-` `(+)` S + be going to + V-inf

`6.` designed

`-` QKD : DHNB : in 1889

`-` `(+)` S + Ved/c2

`7.` is knocking

`-` HTTD

`-` (+) S + be + V-ing

`8.` don't play

`1`.watches

`\rightarrow` Thì HTĐ : S + V s / es / không s , es

`\rightarrow` Đặc điểm nhận dạng : every

`2`.Have you ever met ?

`\rightarrow` Thì HTHT ( CNV ) : Have / Has + S + V3 / PII ( by O )

`\rightarrow` Đặc điểm nhận dạng : ever

`3`.didn't spend

`\rightarrow` Thì QKĐ ( CPĐ ) : S + didn't + V

`\rightarrow` Đặc điểm nhận dạng : ago

`4`.has taught

`\rightarrow` Thì HTHT : S + have / has + V3 / PII

`\rightarrow` Đặc điểm nhận dạng : since

`5`.will fly

`\rightarrow` Thì TLĐ : S + will + V

`\rightarrow` Đặc điểm nhận dạng : tomorrow

`6`.designed

`\rightarrow` Thì QKĐ : S + Ved / V2

`\rightarrow` in 1889 = Quá khứ

`7`.is knocking

`\rightarrow` Thì HTTD : S + be + V-ing

`8`.don't play

`\rightarrow` Thì HTĐ ( CPĐ ) : S + don't / doesn't + V 

`\text{@ TheFox}`