一个英文问题课文中有一句话：Foreverytreebeingplantedtoday,30treesarebeingcutdown.为什么不是：Foreverytreeisbeingplantedtoday,30treesarebeingcutdown.请说明.

Question

一个英文问题
课文中有一句话：
For every tree being planted today,30 trees are being cut down.
为什么不是：
For every tree is being planted today,30 trees are being cut down.
请说明.

Answer 1

一个简单句不能有两个谓语
for在这里不能引导句子,所以后面跟的不能是一个完整的句子【即不能用谓语】
for作为连词的 因为 解释的时候语气最弱 because,since,as,for
不能放于句首
所以这里是介词,不能引导句子