The other day, I happened to meet someone I hadn't seen for many years. I couldn't believe the cha...

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Be Had Has Would have

I saw unusual something happened　　 a terrible accident happened 　　 something unusual was seen by me　　 I saw a terrible accident

to meet; hadn’t seen meeting; haven’t seen to meet; haven’t seen meeting; hadn’t seen

that when how which

other another the other others

where on which that /

haven't seen hadn't seen didn't see don’t see

would fly　　　　　　　　　　 was flying had flown　　　　　　　　　　 flew

would fly was flying had flown flew

other another the other others

walking walked to walk was walking

should fly had flown was flying flew

walking was walking walked was to walk

would fly was flying had flown flew

other another the other others

One day; the other day Some day; one day Some day; the other day The other day; some day

crash break strike conflict

would fly was flying had flown flew

One day; the other day Some day；one day Some day; the other day The other day; some day

appealed to referred to occurred to happened to