`20.` walks
- DHNB: walks
- Thì HTĐ
`21` does Mary usually get up
- DHNB: ususually
- Thì HTĐ
`22.` doesn't wash
- DHNB: every weekend
- Thì HTĐ
`23.` aren't studying
- DHNB: at present
- Thì HTTD
`24.` is having
- DHNB: now
- Thì HTTD
`25.` are making
- DHNB: at the moment
- Thì HTTD
`26.` Does she like
- DHNB: Câu này nói về một sở thích
- Thì HTĐ
`27.` goes
- DHNB: Every week
- Thì HTĐ
`28.` Như câu 21. does your father usually get
- DHNB và thì như câu 21.
`29.` don't go
- DHNB: Diễn tả một sự luôn đúng
- Thì HTĐ
`30.` don't
- Như câu trên
`31.` goes
- DHNB: Diễn tả một sự thật luôn đúng
- Thì HTĐ
`32.` don't visit
- DHNB: very often
- Thì HTĐ
`33.` Does he go
- DHNB: every day
- Thì HTĐ
`34.` Did she come
- Thì QKĐ
`35.` is playing
- DHNB: Look!
- Thì HTTD
`36.` is sleeping
- DHNB: Be quiet!
- Thì HTTD
`37.` is smoking
- DHNB: Look!
- Thì HTTD
`38.` have lived
- DHNB: since
- Thì HTHT
`39.` has just washed
- DHNB: just
- Thì HTHT
`40.` cleaned
- DHNB: yesterday
- Thì QKĐ