It is ten years 是before还是since还是until he come back麻烦帮我讲下before.since,until在这种句子中的区别那如果前面是过去式用什么？如果是完成时用什么呢？

It is ten years since his father died..同意句his grandpa ------- -------- ------- -------ten years ago It is ten years since he ____(join) the army Ten plus ten is ten ,Tenminus ten is twenty .What is it 这是一个谜语. It is ten years since the house （）（build）动词填空.是has built 还是has been built? It is certain that our life in ten years will be( )better than it is now?这里是填a lot of还是even?快. It is ten years since his father dead.同义句.急.His father____ ten years____.His father____ ____ ____for ten years. Tom is ten years old.（提问ten years old） She is ten years old.对ten years old 提问. It is five years since we began to enjoy a _________spring holiday each yearA.ten-dayB.ten dayC.ten day'sD.ten-days It is ten years ince he left the army 翻译 为什么用is It is ten years since Miss Green returned to Canada为什么不用It has been ten years since Miss Green returned to Canada It is about ten years I met you lastIt is about ten years I met you last A since B for C when D as It is ten years since I ___________ (leave) my hometown怎么填啊 It is ten years since I got home last night..啥意思 it is ten years () i left home.A since B after It is about ten years __________ I met you last.A.since It is ten years since his father died.翻译尽量精准,谢谢 英语 自他参军至今已有十年了. It is ten years --- he --- the army