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took have taken had taken have been taking
when was it that when was it when it was that when it was what
did he return; did we know he returned; we knew did he return; we knew he returned; did we know
that; when that; that when; when when; that
have I; when had I; when have I; than had I; than
return returned will return have returned
when; that I got when ; that did I get that ; that I got that ; that did I get
A.since then since when from then from when
influence expression experience expectation
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