Before long、long before和long ago的区别如下： 1. It will be 4 years before he graduates他还有四年时间. It was three months before he finished the work.
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Official google search help center where you can find tips and tutorials on using google search and other answers to frequently asked questions. Before后面加动词什么形式before后面加动词需要用动词ing形式，此时before作介词，介词后面一般都是名词。例句：you mustn't hang out before finishing your assignment.在完成任务之前，你不能出去. It was 10 years before i left china.
It was just 3 days before the book was published.
“it will be…before”和 “it was.before”的区别是什么？ 1 在 “it was + 一段时间 + before从句句型中，若主句是一般过去式，从句也是一般过去式时：① 若主句是肯定句,翻译成“过了多长时间之后才……”例：i Before四种常见句型before四种常见句型如下： (1) it will be+时间+ before 表示“还有多长时间”.或“要过多久才”。before 后面的句子用一般现在时。eg:
