发布网友 发布时间:2023-05-17 05:55
共1个回答
热心网友 时间:2023-05-21 22:25
it is + 一段时间 +since 和 it is + 一段时间 + before的区别:
1、it is + 一段时间 +since表示从这个时间开始到现在...自从.....以来,用法上It + ( 现在完成时 ) + 一段时间+ since + ( 一般过去时 )。
2、it is + 一段时间 + before表示在这个时间之前,或者大约在这个时间上就会发生某事。用法上It + ( 一般将来时 ) + 一段时间+ before +( 一般现在时 )。
拓展资料
it is + 一段时间 +since
1、It is long since you summoned me here.
你已经很久没有召我到这里了。
2、It is ages since we last met.
我们已经好久没见面了。
3、It is efficient since the PHP parser does the dirty work.
用php分析器干这个苦差事是有效的。
4、It is amazing since it could be applied in many areas.
特征向量这个东西可以在很多方向申请。
5、Gold retains a unique place in the commodities pantheon, even though it is decades since governments and central banks stopped using the metal as backing for paper currencies.
尽管各国*和央行在几十年前就停止把黄金用作纸币的后盾了,但黄金仍在大宗商品领域占据独特地位。
it is + 一段时间 + before
1、When you create a variable, you need to declare what type it is before you can use it.
在创建变量时,需要声明变量的类型,然后才能使用该变量。
2、If you read a number from a file and expect it to be positive, check that it is before further processing with that number.
如果从文件中读入一个数字并期望其为正数,那么,在使用其进行进一步处理前对其先验证一下。
3、Listen I misplaced the 240 million dollar lottery ticket. You have to tell me where it is before my wife comes home, I asked.
听着,我不知把那张中了两亿四千万的彩票放哪了,你要在我妻子回到家前告诉我它在哪里。
4、This method tells you all you need to know: whether one node is a descendent or an ancestor of the other, whether it is before or after, and so on.
这个方法告诉您所有想知道的内容:一个节点是另一个节点的后代还是祖先、在前面还是后面等等。