not until this term__to realize how important this subject i

来源：学生作业帮编辑：搜搜做题作业网作业帮分类：英语作业时间：2024/04/28 03:46:16

not until this term__to realize how important this subject is to his future career as a diplomat
A.he began
B.did he begin
C.has he begun
D.thath he has begun
选什么?为什么?
答案是B为什么？

/>not...until 表示直到.才.
当把not until 置于句首时,要倒装
He didn't realize how important the subject is to his future career as a diplomat.
原来的时态应该是过去时,表示以前的一个动作或状态,不该用完成式,
此处的this subject is 可认为是常识,真理.没必要用过去式.

I ()(not realize)low important English was until I went to c Not until i began to work (did i realize) how much time i ha Not until i began to work did i realize how much time i had 解释“This is not how I am” it is at this time that students realize how 26520: it is at this time that students realize how people don't realize how _________(serious/seriously)this pr This is how I lt is not until your( ) friend that () to realize how precio She ()(not realize)how special her mother was until she beca I didn't realize how much time I had wasted until I began to 英语句子的转换Not until I reached home did I realize that I had los