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问一个英语问题The rule requires that everyone have his bike,new or

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/07/18 05:06:42
问一个英语问题
The rule requires that everyone have his bike,new or old , checked once a year.
这里have 为什么不能用用has
该句子要用虚拟语态,因为在一些像:require,request,demand,suggest 等词后面,如果跟动词或从句,后面的动词及从句要用省should 的动词原形.
例如:
1.require sb (should) do sth
2.requires that sb(should) have