英语34.I didn’t know when they________ again.

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英语34.I didn’t know when they________ again.
34.I didn’t know when they________ again.
A.came B.were coming C.had come D.had been coming
为什么

B
come这个短暂性动词的现在分词可以表示将来.
这里的were coming=were goint to come.
(我不知道他们什么时候会再来的）
“再来”是相对"知道"之后的,所以用过去将来时.

英语34.I didn’t know when they________ again. I didn't know when they ____ again.A.came B.were coming C.ha I didn't know when they____again. I didn't know when I would start.(同意句) 英语同义句转换：When she asked me the question ,I didn't know how to I didn’t know I didn't know when they （） for beijing I was ____ surprised ____ I didn't know what to do when I he I don't know when we shall meet again .(改为简单句）英语两句合为一句I didn’t know .Where is your ID card?I didn't know _ when i first ate in a western restaurant i didn't know what 请说明为什么?I saw him ----the room,but I didn't know when he-----