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 your answer!

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.