______ is the center of our planetary system was a difficult concept to grasp in the Middle Age.答案是That the sun and not the earth.为什么Being the sun and not the earth.不可以呢不是非谓语吗,可以做为主语从句中的主语部分

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/02 21:08:04
______ is the center of our planetary system was a difficult concept to grasp in the Middle Age.答案是That the sun and not the earth.为什么Being the sun and not the earth.不可以呢不是非谓语吗,可以做为主语从句中的主语部分

______ is the center of our planetary system was a difficult concept to grasp in the Middle Age.答案是That the sun and not the earth.为什么Being the sun and not the earth.不可以呢不是非谓语吗,可以做为主语从句中的主语部分
______ is the center of our planetary system was a difficult concept to grasp in the Middle Age.
答案是That the sun and not the earth.
为什么Being the sun and not the earth.不可以呢
不是非谓语吗,可以做为主语从句中的主语部分啊

______ is the center of our planetary system was a difficult concept to grasp in the Middle Age.答案是That the sun and not the earth.为什么Being the sun and not the earth.不可以呢不是非谓语吗,可以做为主语从句中的主语部分
动名词才可以作主语

第一个是主语从句,肯定可以作主语,第二个是一个系表结构怎么可以作主语呢