Then everything will be as it was before.

【答】这个句子很完整，不缺成分。

▲as it is原本是个方式状语，现在已演变成一个英语习语，基本意思是“按照现在的样子；像目前的现状；根据现在情况看，照目前的情况看来”。其过去式是as it was，其过去完成式是as it had been。

▲as it was和as it had been，在时间上指过去，意为“按照当时的样子；像那时的现状；根据当时情况看，照那个时候的情况看来”。

稍加分析我们就看出，它实际是as引导的方式状语从句，as的意思“按照......样子，像......那样”。

Leave it as it is. 照现在的样子把它放在那儿。

Don't shut the door, it's all right as it is. 不要关门，原样开着好。

Except for the loss of his miraculous powers, everything was back as it had been. 除了失去他那不可思议的能力之外，一切都回到了以往的状况。

I looked around the hotel parlour, and now it was restored as it was in 1927.  我看了看饭店的客厅，现在已恢复到1927年的样子。

Yes, the economy is growing instead of shrinking, as it was in 2008 and the beginning of 2009.

是的，我们的经济已经开始增长，而不是像2008年至2009年初所经历的萎缩。

As the years passed, most Americans were able to return to life as it had been before Nine-Eleven.

随着时间的推移，大部分的美国人民能够从悲痛中解脱出来，并重归“9.11”之前正常的生活。

I tried and failed to remember her face as it had been during the trial. 我怎么也想不起她在审判期间的那幅面孔了。

▲as it was除了作方式状语外，还可以作表语。例如：

This statute will remain as it was before. 此项法规仍旧。

The king's hand was restored him again, and became as it was before. 国王的手就复了原，仍如寻常一样。

Remember, on the stroke of twelve, the spell will be broken and everything will be as it was before. 记住，当时钟敲响到12点的时候，钟将会打破，一切事情又恢复了从前。