- By the time they __________ (realize) the mistake, the email __________ (already/send).
- I __________ (know) the truth after he __________ (explain) everything to me.
- Before the storm __________ (hit), we __________ (secure) all the windows.
- She __________ (be) very surprised because she __________ (not/hear) the news yet.
- We __________ (move) to a new house last month but we __________ (live) in the old one for 10 years.
- They __________ (not finish) their project until they __________ (receive) all the necessary information.
- After I __________ (read) the book, I __________ (understand) why it was so popular.
- He __________ (take) a deep breath and __________ (dive) into the pool after he __________ (make) sure it was safe.
- Before we __________ (meet) yesterday, I __________ (not/know) about your new job.
- She __________ (feel) much better after she __________ (take) the medicine.
- The guests __________ (arrive) after the host __________ (prepare) everything for the party.
- They __________ (sell) their old car because they __________ (buy) a new one.
- Before the teacher __________ (enter) the room, the students __________ (start) chatting.
- I __________ (not/see) him since we __________ (graduate) high school.
- The movie __________ (already/start) by the time we __________ (arrive) at the cinema.
- She __________ (decide) to call her friend after she __________ (think) about it all day.
- After they __________ (eat) lunch, they __________ (go) for a walk.
- We __________ (be) friends for years before we __________ (become) roommates.
- I __________ (hear) about the accident only after I __________ (turn on) the TV.
- The team __________ (win) the championship because they __________ (train) hard all season.
Answers for Self-Checking:
- realized ... had already been sent
- knew ... had explained
- hit ... had secured
- was ... hadn't heard
- moved ... had lived
- hadn't finished ... had received
- read ... understood
- took ... dived ... had made
- met ... hadn't known
- felt ... had taken
- arrived ... had prepared
- sold ... had bought
- entered ... had started
- haven't seen ... graduated
- had already started ... arrived
- decided ... had thought
- had eaten ... went
- had been ... became
- heard ... had turned on
- won ... had trained