We think it's a good idea to allow teenagers to study in groups?为什么allow、study前加to?
问题描述：
We think it's a good idea to allow teenagers to study in groups?
为什么allow、study前加to?
答
好好想想先。。。
答
"to" is a preposition. This is part of the English language Grammar.
you need to use "to" and a verb, combine to produce an adjective, to describe the noun "idea"
答
study前的to是“allow ... to ...” 的词组允许做某事。
allow前的to是“it's a good idea to ...”类似于指示代词，表明目的。。。
答
to 后表示目的，说明是什么样的好主意。
答
allow前的to是短语“it’s.to do sth” 意思是“做什么是…的”
study后面的to是“allow to do sth” “允许做某事”