1) His uncle (teach)...... English in our school five years ago
⇒ taught
DHNB thì QKĐ "five years ago"
2) the old man (fall)... as he (get)....into the bus
⇒ fell - got
Thì QKĐ diễn tả hai hay nhiều hành động xảy ra liên tiếp nhau trong quá khứ
3) When I saw him, he (sit)...... asleep in a chair
⇒ was sitting
Thì QKTD diễn tả hành động đã đang xảy ra trong quá khứ (was sitting) thì một hành động khác xảy đến (saw)
4) There (be).... a lot of noise at the fair yesterday
⇒was
DHNB thì QKĐ "yesterday"
5) It (take)..... me 5 minutes to walk to school last year
⇒ took
DHNB thì QKĐ "last year"
6) They ( not speak )......... to each other since they left school
⇒ haven't spoken
DHNB thì HTHT "since"
7) I (try) ....... to learn English for years, but I (not succeed)...... yet
⇒ have tried - haven't succeeded
DHNB thì HTHT " for years" - "yet"
8) I ( not see) ..... her since last week
⇒ haven't seen
DHNB thì HTHT "since"
9) John (do)..... his homework already
⇒ has done
DHNB thì HTHT "already"