有关状语从句It will be 4 years before he can join the army.为什么只能用b

有关状语从句It will be 4 years before he can join the army.为什么只能用b It will be four years ( ) he can join the army .什么状语从句啊?用什么呢 It is ten years since he ____(join) the army How long before did he join the army?改错. How long before did he join the army?改错 英语翻译还有It will be three years before he graduated. 有关状语从句-------it rains ,the game will be played on time.答案是Un 1.It is two years ＿I joined the army.A.before B.since C.that it will be months before he can come back. It___ten years since he left the army.A.is B.has C.will D.wa 15、 It _____ ten years since he left the army .A.is B.has C. It _____ ten years since he left the army . 　A. is B. has C.