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一些关于英语的问题1,You_____make such mistakes againA.should neverB.s

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一些关于英语的问题
1,You_____make such mistakes again
A.should never
B.should not always
C.would always not
D.would not forever
此题AB选项如何区分?
2, Since when______her?
A.did you know
B.have you known
C.do you know
D.you know
since提问的用法我不懂,请高手讲一下
3,We haven't heard from Jane for a long time.
What do you suppose________to her?
A.was happening
B.to happen
C.has happened
D.having happened
suppose的词组用法我没学,最好一一分析4个选项
4,_________we have today!
A.How fine day
B.What fine day
C.How a fine day
D.What a fine day
BD选项如何分辨?
另外如果你知道,请教我一下You need或You must开头的反义疑问句逗号后的用法
好的一定给分!
1.A
not always = little/few 少
never 无
2.B
since 常用于完成时,表示过去持续到现在
3.C
be supposed to do 应该.
suppose to do 认为.(将来)
suppose that 猜想.
此外,I/You suppose 还可以作插入语= I think
这句话里,do you suppose 是插入语,提问过去发生了什么,对现在有影
响,用完成时更好
4.D
关键看名词可不可数.day是可数名词,所以加a
need提问,反义疑问句
Yes,you must.No,you needn`t
must提问,反义疑问句
I must ...,needn`t I