Question

提问英语语法1？

请分析语法现象（要详细）！
The door opened,and____.
A.came in some students with flowersin their
hands
B.in came some students with flowers in their
hands
C.in did some students come with flowers in
their hands
D.did some students with flowers in their
hands come in
答案：B
为什么介词in要提前

Answer 1

纵观选项ABCD,可以看出后半句是个倒装句式，而且是完全倒装，也就是宾语+谓语+主语，这里in是副词，来修饰came，正常语序是came in,那么完全倒装就是in came了。
some students with flowers in their hands 是一个整体作为主语，但这个整体内部的语序是正常的，并不参与整个句子的倒装。with flowers in their hands是后置定语，修饰students.
再来看with flowers in their hands部分，in their hands又是后置定语，修饰flowers.
一层又一层，剥离出来，清楚了吧。

Answer 2

语法现象：倒装、with的复合结构。