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was; was raining is; has rained is; is raining will be; will rain
Have, seen, have, seen Did, see, did, see Have, seen, did, see Did, see, have, seen
the; the the; / a; / a; the
Have… seen… did… see Did…see…die…watch Have…seen… have… seen Did…see…have…seen
to happen; walked happen; was walking had happened; was walking was happened; walked
if did you see if you had seen whether did you see that you had seen asked
the; the the; / a; / a; the
is raining rains was raining has rained
you happen you happened happened to you did you happen
was; was raining is; has rained is; is raining will be; will rain
the; the the; / a; / a; the
did you you did can you you can
Did you see; did you see Have you seen; did you see Do you see; have you seen Have you seen; have you seen
the, the the; 不填 a; 不填 a; the
the; the the; / a; / a; the
is…was raining was…had rained is…is raining was…was raining
to happen; walked happen; was walking to happen; was walking was happened; walked
you happen you happened did you happen happened to you
the; the the; 不填 a; 不填 a; the