"Is it expensive to buy things on the train?"谁帮我分析出里面的知识点啊?
问题描述:
"Is it expensive to buy things on the train?"谁帮我分析出里面的知识点啊?
答
在火车上买东西会贵吗?
分析:这是一般疑问句,It作形式主语,真正的主语是:to buy things on the train.这种结构在英语中我们常表示为:It is + adj+ to do sth,做某事是……的.