在英语中,当"only"置于句首时,句子通常会进行部分倒装。这意味着助动词、情态动词或be动词会移到主语之前。以下是一些常见的倒装结构:
1. 如果句子以"only"开头,并且后面跟着一个助动词(如do, does, did)或情态动词(如can, could, may, might, must, shall, should, will, would),则助动词或情态动词会倒装:
Only did he realize the importance of time.
Only can he speak French fluently.
2. 如果句子以"only"开头,并且后面跟着一个be动词(如am, is, are),则be动词会倒装:
Only was she aware of the change.
Only are they aware of the new rules.
3. 如果句子以"only"开头,并且后面是一个含有be动词的名词性从句,则be动词会倒装:
Only when he looked in the mirror did he realize how tired he was.
请注意,如果"only"后面直接跟主语和动词,不需要倒装:
Only he can solve this problem.
Only she knows the answer.
当"only"置于句首时,要特别注意句子结构的倒装,以确保句子符合英语语法规则。
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