（lt is good to eat all the food on your plate）画出句子的主语
问题描述：
（lt is good to eat all the food on your plate）画出句子的主语
答
It 是形式主语，to 后面的才是真正的主语 eat all the food on your plate
答
to eat all the food是主语
答
真正的主语是to eat all the food on your plate
因为主语太长,避免头重脚轻,用it做形式主语
答
it 是形式主语，真正的主语是to eat all the food on your plate