A.being completed | B.completed |
C.to be completed | D.having been completed |
A.tying | B.tied | C.to tie | D.tie |
A.regret to say | B.regret saying | C.regret to have said | D.regret said |
A.to cause | B.causing | C.to be causing | D.to have caused |
A.to work | B.work | C.in working | D.worked |
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