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only if 和 only 倒装区别

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only if 和 only 倒装区别
_____ will Mr.Forbes be able to regain control of the company.
a.Only with hard work
b.Only if he works hardly
为什麽b不对?
only if 和 only 倒装区别
only位于句首有三种状况会引起句子倒装
1.only+副词
e.g.Only then did I realize the importance of study.
2.only +介词短语
本题就是这种状况
3.Only +状语从句(主句倒装,从句不倒装)
e.g.Only When I graduated from school,did I realize the importance of study.
但要注意:only +名词或代词作主语,句子不倒装
e.g.Only he knows the answer to the question.
only if 是只要的意思,句子不需要倒装,因此本题中的B不正确