Only then did I realize what a mistake I have made.

问题描述:

Only then did I realize what a mistake I have made.
只是到了那时我才意识到我犯了个什么错误.
1.这倒装句中did是什么意思?realize是动词?
2.此倒装句的正常句是什么?

1,这是以ONLY开头的倒装句,did只是个助词,是realized的倒装形式,realize是动词
2,i realized what a mistake i have made only then.