`26` have visited `->` visited

`-` QKĐ, dấu hiệu: last month

`->` `(+)` S + V2/ed

`27` practised `->` has pratised

`-` HTHT, dấu hiệu: since then

`->` `(+)` S + have/has + V3/ed

`28` have travelled `->` travelled

`-` QKĐ, dấu hiệu: last year

`->` `(+)` S + V2/ed

`29` already started `->` have already started

`-` HTHT, dấu hiệu: already

`->` `(+)` S + have/has + V3/ed

`30` has miss `->` has missed

`-` HTHT, dấu hiệu: ever since she moved away

`->` `(+)` S + have/has + V3/ed

`-` miss (V1) `->` missed (V2) `->` missed (V3)