求all of a sudden用法
问题描述：
求all of a sudden用法
一定要放句中么?
有all of sudden么?
答
常放在句首：
例如：
All of a sudden lightning struck the tree we were sitting under.I felt a sharp pain in my side all of a sudden.
All of a sudden we heard a loud explosion that shook the building.
这里 sudden 是名词,要有冠词 a.