情态动词与实义动词的区别?例如He needs to spend more time on his study.这里的to spend为什么不能换成spend,

分类: 作业答案 • 2022-01-09 18:03:45

问题描述：

情态动词与实义动词的区别?
例如He needs to spend more time on his study.这里的to spend为什么不能换成spend,

答