Mn giúp tớ vs ạ lm từ câu 15 xuống ạ

`15.` show

`-`can/could + V_inf : có thể làm gì

`16.` are going

`-` now `-` HTTD
`-` HTTD: `(+)` S + am/is/are +  V_ing + O
`17.` will mail

`-` tomorrow `-` TLĐ

`-` TLĐ: `(+)` S + will +  V_inf + O
`18.`phones

`-` three or four times a week `-` HTĐ
`-` HTĐ: `(+)` S + V(s/es) + O

`19.` am going to wash 

`-` TLG: `(+)` S + am/is/are + going to + V_inf + O
`-` I + am

`20.` will have

`-` tomorrow `-` TLĐ

`-` TLĐ: `(+)` S + will + V_inf + O