根据英语语法,only 修饰状语位于句首时,后面的句子要用部分倒装。如:
Only in this way can you learn English.
但是,如果位于句首的only+状语后面有一个逗号与句子其他部分隔开呢?还要倒装吗?比如下面两句,哪句对?
Only in this way, you can learn English.
Only in this way, can you learn English.
用于句首的“only+状语”的后面好像很少用逗号,但即使有逗号,仍要倒装。如:
Only when they got to a safe place, could we regard ourselves as having done our duty. 只有当他们到达安全地方的时候,我们才能认为自己尽到了责任。(席玉虎《英语常用词用法·详解大词典》)
Only in extremity, when his defences had been reduced by six weeks of bombing, was he ready to leave. 经过6周的轰炸,他的防御已经不堪一击,在这种极端情况下他才愿意离开。(《柯林斯高阶英汉双解学习词典》)