only 句首怎么倒装

only 句首怎么倒装？

only倒装用法

一 、“only+副词”位于句首：

1、Only then did I realize that I was wrong.

只是到了那时我才意识到是我错了。

2、Only by shouting was he able to make himself heard.

他只有叫喊才能让别人听到他。

二、“only+介词短语”位于句首：

1、Only by working hard can you succeed.

只有努力工作你才能成功。

2、Only in the reading-room can you find him.

你只有在阅览室才能找到他。

三、“only+状语从句”位于句首：

Only after she died was I able to appreciate her.

只有到她死后我才认识到她的价值。

四、注意：若位于句首的不是only+状语，而是 only+宾语等，则通常无需倒装(但有时也可以倒装)：

Only a policeman the children saw in the street.

孩子们在街上只看到一个警察。