2.What do you mean,there are only ten tickets?There -- --- b

问题描述:

2.What do you mean,there are only ten tickets?There __ ___ be twelve.
帮我解释下情态动词shall 和 should 的不同用法 can 和must
1个回答 分类:英语 2014-12-14

问题解答:

我来补答
ought to 与 should 差不多,应该,是此题答案
must一定,can用否定的,can't不可能
shall在这类的情态动词里不常见,
 
 
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