Question

最后一句的语序为什么不用陈述句的语序，求分析

Answer 1

Only位于句首修饰壮语要倒装 ;就像如原文最后一句，then是时间状语，所以句子是倒装语序。
句中will 是助动词,如果这个句子正过来说就是 I will have a chance to
achieve my dream only then
在句首的only如果后面跟了副词、介词短语或从句等状语，则主句用倒装结构。如only后跟
的是主语，就不用倒装结构了。例如：
Only when the war was over in 1918 was he able to get back to work．
Only in this way can you learn English well．
Only the teachers are allowed to use the room．（不倒装）
Only five men were hurt in the accident．（不倒装）
注意，only和所修饰的状语如果不在句首，则不倒装。
例如：
The boy was helped out only when his father arrived in a hurry．
Only then did he realize the importance of English
Only then ,是过一小会儿的意思，一般用在句首，引导倒装句。
例句Only then did he realize the importance of English．
Only when the war was over in 1918 was he able to get back to work．(倒装句）
Only five men were hurt in the accident．（不倒装)

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非常感谢☺️

Answer 2

only的倒装句