有关状语从句It will be 4 years before he can join the army.为什么只能用before?用that 或when It's 10 years ago +that?那么when呢?又是怎样使用?
2022-10-01 11:13:28 18次 反馈错误 加入收藏 正确率 : 100%
题目内容：
有关状语从句
It will be 4 years before he can join the army.
为什么只能用before?用that 或when
It's 10 years ago +that?
那么when呢?又是怎样使用?
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