Only after her mother came to help her was she allowed to begin her project.

问题描述:

Only after her mother came to help her was she allowed to begin her project.
正常语序是:She was allowed to begin her project after her mother camte to help her .用Only开头的句子与另外一个表达有什么区别,(用Only的比较正式化?外国人常用那种呢?

Only在这里是倒装句.当句首状语由“only +副词”,“only +介词词组”,“only +状语从句”构成时,句子须倒装.例如:Only yesterday did he find out that his watch was missing.Only because there were some cancel...