英语语法问题could / should have done用法—Tom is never late for work.Why is he absent today?—Something ________ to him.A.must happen B.should have happened C.could have happened D.must have happened 此题选D谁能帮我分析一下?尤

英语语法问题could / should have done用法—Tom is never late for work.Why is he absent today?—Something ________ to him.A.must happen B.should have happened C.could have happened D.must have happened 此题选D谁能帮我分析一下?尤 英语语法选择题中 什么时候会选didn`t的选项 有什么作用 还有could shoul英语语法选择题中 什么时候会选didn`t的选项 有什么作用 还有could should would must 看到什么标志词会用 could和should不同 几个英语语法问题：状语从句1.You should be firm ____ you believe yourself to be correct.( where 和 in which 的区别 ) 2._____that these boys were too young ,they could be excused.A.Giving B.Suppose C.Considered D.Given说下原 虚拟语气中的两个问题1.should,could,might,would的区别,注意是在虚拟语气中2.if条件的倒装中not加在主语前还是后?比如是had it not been还是had not it been?最后请推荐一本高中英语语法题目的书, should i would i could could和should的用法? should和could的区别~ could和should的区别? should和could的区别 should和 could的区别 I should have gone with them,but I ___ my homework in time 一道英语语法题为什么答案是could not finish而不是could not have finished 或 might not have finished 或might not finish 英语语法句子成分分析问题,详见问题补充.To what email address should this link?这应该是一个特殊疑问句,为什么 to提到句子的最前面? 英语语法问题-请问这是要用 who还是whom?为什么?Do you want a friend whom/who you could tell everything to,like your deepest feelings and thoughts? “英语语法问题”用英语怎么说? 英语语法问题：什么是限定词啊? 英语语法问题（关于代词） 英语语法问题 这句有什么错误