it is ...since it was...before 一定是过去式吗?

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/14 09:07:06

是的,since本身的意思就是从...起是从过去的某一个时间点开始
再问：我问的是before的句型前面一定是was吗？
再答：对啊为什么before之前要用过去式关键在于since啊你这样问就不专业了
再问：在于since = =?我问的是before的单独句型。。。跟since木关系。
再答： it is ...since it was...before 这句话考点就是在于since since就是表示从...开始而before则是之前也可以用ago 这在英语中叫做since引导的从句

it is ...since it was...before 一定是过去式吗? It is +一段时间+since+从句和 before It was different from before 中before 是代词吗有没有it is been+段时间+since和it was be+段时间+before这种表达? It is/has been +时段+since从句 It was/be+时段+before从句用些这英语句型造个句 It is/has been…since… It was/will be…before… 这两个句 It was a wonderful planet!为什么是was(过去式）呢?不应该是is吗? it was +since It is ten years 是before还是since还是until he come back it is five years since we began learing English 为什么是it was 是It is five months since they have moved to China还是it was... It is\has been+时间段+since+一般过去式=时间段+（）+since+一般过去式