A.done | B.being done | C.was done | D.having done |
A.type | B.to be typed | C.typing | D.typed |
A.to read | B.to have read | C.reading | D.having read |
A.known | B.knowing | C.to be known | D.having known |
A.having caused | B.causing | C.caused | D.being caused |
A.going | B.to go | C.gone | D.go |
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