英语单选问题如题：-Tom has to stay at home to look after his sister t

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英语单选问题
如题：-Tom has to stay at home to look after his sister tomorrow,________?--Yes,because his mother has to work.
A dose he B has he C dosen't he D hasn't he
请问这种疑问句横线处怎么选?我记得有的选过 was he?wasn't didn't she?这种题怎么选?求人告诉下

选C
这种反意疑问句的思路是三部法
第一,判断疑问部分的肯定还是否定,前肯后否,前否后肯,要注意前面有否定词的情况,never,seldom的情况,视同否定
第二,找助动词,这个题目,你就不能把has to 理解成完成时的助动词,其实他谁一般现在时,因此,助动词用does
第三,找出主语
因此,这题是doesn't he
再问：助动词不是就has to 吗怎么就得用does ??
再答： has to 是have to 的一般现在时的三单形式，因此，助动词是does，比如说，她的否定是，he doesn't have to,而非，he hasn't to 并不是现在完成时里的have has 助动词这点尤其是注意，不能混淆 l另外，原句里并没有be 动词，因此和wasn't 不搭界

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