`-` Hành động đang diễn ra trong quá khứ chia quá khứ tiếp diễn, hành động xen vào chia quá khứ đơn

`-` Hành động xảy ra liên tiếp trong quá khứ đều chia quá khứ đơn

`-` Hai hành động xảy ra trong quá khứ đều chia quá khứ tiếp diễn

`I`

`1`. was reading - was watching

`2`. came - switched - checked

`3`. sneaked - stole - left

`4`. was playing - was doing

`5`. were doing - were lying

`6`. woke up - looked

`7`. welcomed - asked

`8`. broke - had

`9`. was swimming - were sunbathing

`10`. came - looked - told

1. While Tom (read) was reading , Amely (watch) was watching a documentary on TV.
2. Marvin (come) came home, (switch) switched on the computer and (check) his emails.
3. The thief (sneak) sneaked into the house, (steal) stole the jewels and (leave) without a trace.
4. Nobody (listen) was listening while the teacher (explain) was explaining the tenses.
5. While we (do) were doing a sight-seeing tour, our friends (lie) were lied on the beach.
6. He (wake) woke up and (look) looked at his watch.
7. The receptionist (welcome) welcomed the guests and (ask) asked them to fill in the form.
8. The car (break) broke down and we (have) had to walk home.
9. The boys (swim) were swimming while the girls (sunbathe) were sunbathing.
10. My father (come) came in, (look) looked around and (tell) told me to tidy up my room.