英语副词修饰全句确实要有逗号。
这里第一句Suddenly she went out of the room. 个人认为例句举例有问题。这里suddenly并不是修饰整个句子,“她突然走出了房间”,其实是修饰went 这个动词,应为she suddenly went out of the room. 但是由于英语里状语位置比较灵活,所以也可以将其置于句首。又如时间状语和地点状语一样,既可以置于句首又可以置于句尾,如Yesterday we had a picnic.=We had a picnic yesterday. 但是这里的副词并不是修饰整个句子的。
英语副词修饰全句要有逗号。
比如:However, she didn't finish her homework. 然而,她没有做完作业。
Fortunately,she didn't lose her way. 幸运的是,她并没有迷路。