should 后面是不是必须跟动词原形?比如:we should first read the real estate ads in the newspater.还有这句话是否可以改成:Firstly,we should read the real estate ads in the newspater.如果可以,第一句话里的first 是什么

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should 后面是不是必须跟动词原形?比如:we should first read the real estate ads in the newspater.还有这句话是否可以改成:Firstly,we should read the real estate ads in the newspater.如果可以,第一句话里的first 是什么

should 后面是不是必须跟动词原形?比如:we should first read the real estate ads in the newspater.还有这句话是否可以改成:Firstly,we should read the real estate ads in the newspater.如果可以,第一句话里的first 是什么
should 后面是不是必须跟动词原形?比如:
we should first read the real estate ads in the newspater.
还有这句话是否可以改成:Firstly,we should read the real estate ads in the newspater.
如果可以,第一句话里的first 是什么词性?后一句里的呢?

should 后面是不是必须跟动词原形?比如:we should first read the real estate ads in the newspater.还有这句话是否可以改成:Firstly,we should read the real estate ads in the newspater.如果可以,第一句话里的first 是什么
First
adv.
首先
First we'll have breakfast,then we'll walk to school.
我们首先吃早饭,然后步行去学校.
第一次,初次
when we first met
我们初次见面时
Firstly
adv.
首先;第一
There are three reasons against it:First...
有三个反对的理由
两个都对的,词性不同而已!