英语现在分词做状语现在分词做状语修饰整个句子?现在分词引导的句子在句首时一般做状语?Looking forward to

1）现在分词可以作时间、原因、方式、伴随以及补充说明等状语,如：

Entering theroom,he saw many people were already there.（时间状语）
Knowing that itwas going to rain,he decided not to go out.（原因状语）
Laughing and talking,they went out for a walk together.（方式状语）
She stoodthere,waiting for the bus.（伴随状语）

2）现在分词还可以构成独立主格结构做状语,如：

I’ll come,weather permitting.天气好的话我就来.（条件状语）
Their room wason the second floor,its broad window overlooking the park.（补充说明）

3）一般情况下,句首的分词短语多作时间和原因状语,但是也可以根据说话人的强调程度放在句尾.