I won't sleep well if(I don't read)in bed for half an hour.

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I won't sleep well if(I don't read)in bed for half an hour.
a.I'm not reading b.I don't read c. I didn't read d. I wasn't reading
这里为什么选B?其他三项为什么不行呢?请帮忙分析一下,有点混乱. .

因为依内容分析,此句型是属於下列的型态4,『现在或未来可能发生的状况』,所以要选B.
1.与现在事实相反
If+S+过去式动词,S+would(could ,should,might)+原型动词
例如:If I were rich,I would help you.
因为现在我不有钱,所以是与现在事实相反的用法
2.与过去事实相反
If+S+过去完成式,S+would(could ,should,might)+have+p.p
例如:If he had told me the truth,I would not have made the mistake.
因为已经是过去的事了,所以假设句一律用完成式
3.与未来事实相反
表示对未来事情的假设,实际上绝不可能发生.
If+S+were to +V,S+would(could,should,might)+原型动词
例如:If we were to live to be 200 years old,we could change everything.
4.现在或未来可能发生的状况
If+S+现在式动词,S+ 祈使句或 will(can,may,shall )+原型动词
例如:If it rains tomorrow,I shall not go.
再问：请问第4种可以算是虚拟语气吗？
再答：是的，現在或未來『可能』發生的狀況→是是虛擬語氣。
再问：那和主将从现有关系吗？如果像楼上所说的是主将从现，那后面是不是应该填i didn't read？

I won't sleep well if(I don't read)in bed for half an hour. I don't sleep in --------i won't be in for dinner tonight ----------well,i ( I went to bed but could not sleep.Every quarter of an hour t When I don't sleep well? 条件状语从句练习If he ___in half an hour,we ___wait for him.A.won't i don't usually _____(am read/read) in bed at nine o'ciock i Don't read in bed. 很简单的句型转换I won't work well if you don't help meI won't work w 选择 1.I____ here for half an hour.I can't wait for all day.A. Don't read in bed ,for there in no _____ i don't get to sleep in