only adv. 只，仅， 不料；这里我想给大家分享一下only 置于句首的用法。only 状语置于句首习惯上要用倒状语序。only引起的部分倒装需满足两个条件：1.only置于句首。2.only后跟状语（状语的具体表现形式有：介词短语，副词，状语从句）.那什么是部分倒装呢？部分倒装就是把一个句子的系动词，助动词，情态动词置于主语之前如：

Only through practising over and over again did Tom get the driving licence.

Only in this way can we learn English well.

Only when my parents left did I realize I love them so much.(注意：only 后为状语从句时，从句不倒装，主句倒装）

Only when we protect ourselves carefully can we prevent us from being infected with coronavirus.

Only then did I find the errors in my composition.

Only强调句子主语是不倒装。如：

Only you can solve this problem.