She can't sleep well before she ______takes an exam .before是介词,take 为什么不加ing
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![She can't sleep well before she ______takes an exam .before是介词,take 为什么不加ing](/uploads/image/z/14169596-68-6.jpg?t=She+can%27t+sleep+well+before+she+______takes+an+exam+.before%E6%98%AF%E4%BB%8B%E8%AF%8D%2Ctake+%E4%B8%BA%E4%BB%80%E4%B9%88%E4%B8%8D%E5%8A%A0ing)
She can't sleep well before she ______takes an exam .before是介词,take 为什么不加ing
She can't sleep well before she ______takes an exam .before是介词,take 为什么不加ing
She can't sleep well before she ______takes an exam .before是介词,take 为什么不加ing
因为before后面的she takes an exam是一个完整的从句,所以当然不加ing.如果只是动词短语,那么必须加ing ,如:
She can't sleep well before taking an exam .
祝楼主进步!
要是答案还满意的话,记得采纳哦,O(∩_∩)O谢谢~!
before 在此是连词,在...之前,后面接的是一个句子,而不是直接接的动词,所以不用ing形式。
如果中间没有那个she就加ing
before在这里是连词