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was winding up; had left would up; had forgotten had wounded; left was winding up; forgot
broken into put into broken up put up
give up keep off call off wait for
did I feel had I felt was I felt I felt
give up keep off call off wait for
did I feel had I felt I felt I had felt
I had picked up；when had I picked up；then had I picked up；when I had picked up；then
I knew I did know did I know had I known
did I feel had I felt I felt I had felt
while; when when; as as; after when; before
I had picked up; when had I picked up; then had I picked up; when I had picked up; then
while;when when;as as;after when;before
must；must had to；have to had to； must have to；must
I had picked up；when had I picked up；then had I picked up；when I had picked up；then
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