【简介】感谢网友“雕龙文库”参与投稿，这里小编给大家分享一些，方便大家学习。
【导语】英语语法让很多学生都头疼，因为复杂难懂的句式和词组有时难以记忆。英语网为大家整理了英语语法大全，希望对同学们的英语语法学习有所帮助。更多内容尽在英语网。
请看下面的题：
An awful accident _________, however, occur the other day.
A. does B. did C. has to D. had to
【分析】此题正确答案应选B，句末的 the other day 意为前几天，所以句子应用过去时态，而选项D填进去不合题意，故选B。此句有两个难点：一是句中插有 however 一词，分散了同学们的注意力;二是所填选项B为许多同学所不熟悉的强调用法。又如(答案均选B)：
(1) Your mother _________, however, say that to us that day.
A. does B. did C. is doing D. was doing
(2) Our math teacher _________, however, speak English well.
A. doing B. does C. is doing D. was doing
