we were wandering in the street when

from behind 一类表位置关系的介词短语放在句子前面时一般用【全部倒装】语序
再如：
On the wall hangs a picture
In front of the house sat an old man
did a frightened voice come 是部分倒装,不符合习惯可是did a frightenedvoice come也是倒装啊，难道它不是全部倒装吗？不是， 这是部分倒装。全部倒装还用得着助动词did 吗？ 直接把实意动词came 前置即可Notuntilthecar lookedalmost new didhe stop repairing andcleaningit.这句跟刚才那句有什么区别？这句是什么倒装啊？这是部分倒装
语言点：
当否定副词not, never hardly little 等置于句首时要用【部分倒装】语序
再如：
Never have I seen him.
Little did he care for money.
Hardly can he walk any farther.