`1.` ever

`-` ever (adv): bao giờ

`2.` still

`-` still (adv): còn

`3.` already

`-` already (adv): rồi

`4.` just

`-` just (adv): vừa mới

`5.` since

`-` since (adv): từ khi

`-` since + QKĐ

`6.` for

`-` for (adv): khoảng

`-` for + khoảng thời gian

`7.` never

`-` never (adv): không bao giờ

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Thì hiện tại hoàn thành: 

$(+)$ S + have/ has + V(pp)

$(-)$ S + have/ has + not + V(pp)

$(?)$ Have/ Has + S + V(pp)?

`-` Have/ Has + S + ever + V(pp)?

`-` S + still + has/ have + not + V(pp).

`-` S + have/ has + already/ just + V(pp).

`-` S + have/ has + V(pp) + since + mốc thời gian/ since + QKĐ/ for + khoảng thời gian

`-` Have/ Has + S + V(pp) + yet?

`-` S + have/ has + not + V(pp) + yet.