Having got everything ready，they got down to map out a plan for the construction of a
new express way.
Arriving home at daybreak，he felt tired.
Having failed several times，they need some encouragement.
Entering the room，nobody was found in it.(误)
Entering the room，I found nobody in it.(正)
(意为When I entered the room ... )
Seeing from the hill，the village looks very beautiful.(误)
Seen from the hill，the village looks very beautiful.(正)
Having met with an accident，the newspaper correspondent was not able to send a ca-
ble.(= Because he had met with an accident…)
The students having done all the exercises, the teacher went on to explain the text.
The report having been read，a lively discussion began.
(With) all factors considered，we think this program may excel all the others in achiev-
ing the goal.
独立结构中的being, having been有时可省去。例如:
The question (having been) settled, the meeting adjourned.
This (having been) done，we began to start out.