What/ sport/ you/ play/ after school/ yesterday?
`->` What sport did you play after school yesterday? (yesterday `->` thì QKĐ)
Nam/ I/ study/ hard/ last weekend.
`->` Nam and I studied hard last weekend. (last weekend `->` thì QKĐ)
`1.`finishes (usually `->` HTĐ)
`2.`are ; are watching (Diễn tả một hành động đang xảy ra `->` thì HTTD)
`3.`doesn't shine (every day`->` HTĐ)
`4.`has (Viet Nam là danh từ số ít)
`5.` is wearing (Dấu hiệu: Look! `->` HTTD
`6.`is looking (Dấu hiệu: Be careful! `->` HTTD)
`7. `has learned (for three years `->` HTHT)
`8. `did you know ; have know (for five years `->` HTHT)
`9.`have she fed (HTHT do có yet)
`10.`haven't ; have been (HTHT do có since)
