完全倒装一般具有以下两个条件：①谓语动词是单个(即不带情态动词、助动词或be)的不及物动词，且只限于一般现在时或一般过去时;②主语只能是名词。

here, there, out, in, up, down, now, then, away等副词放在句首，句子需要完全倒装

[例句]

Here comes the bus. =The bus is coming. 汽车来了。

There goes the bell! = The bell is ringing. 铃响了!

Now comes your turn to make a short speech. 该轮到你发言了。

Then came the hour we had been looking forward to. 我们期盼的时候到了。

Out rushed the children. 孩子们冲了出去。