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问题: 一道简单选择题!!!

Only when you have learned grammar well_______ write correctly.
A.you will B.you can C.can you D.can't you

我要的不是答案,我想要为什么要选哪个
谢谢!!!

解答:

我选C,因为这个句子是only的倒装句,原來的语序应该是You can write correctly only when you have learned grammar well.将only及后面的定语从句提前,句子主句的语序就会将be动词或者情态动词提前变成疑问句语序
但是我不确定,很早以前学得了,反正be动词绝对提前,情态动词我吃不准