作业帮助动词和情态动词改错问题1They should (use) coal,but they had to use oil instead,because there remained little coal.括号里的是错的.为什么说should have used,而不说could use呢?说should have used的话是说“应该用了”,
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/08 13:51:25
助动词和情态动词改错问题1They should (use) coal,but they had to use oil instead,because there remained little coal.括号里的是错的.为什么说should have used,而不说could use呢?说should have used的话是说“应该用了”,
助动词和情态动词改错问题1
They should (use) coal,but they had to use oil instead,because there remained little coal.
括号里的是错的.为什么说should have used,而不说could use呢?
说should have used的话是说“应该用了”,说could use的话是说“原可用”,请问有啥米区别吗?
助动词和情态动词改错问题1They should (use) coal,but they had to use oil instead,because there remained little coal.括号里的是错的.为什么说should have used,而不说could use呢?说should have used的话是说“应该用了”,
这个是虚拟语气,should have used是有种遗憾的语气,说他们本来可以用的.could use 是能否的语气,是说他们可以用或者不可以用,但题目中当时没有谁限制他们能否用
SHOULD HAVE USED是指应该做了却没做,因为后面有BUT,没有使用煤炭
COULD USE是指有能力做却没做,但是后面说because there remained little coal,也就是说没有能力使用煤炭,所以不能用COULD USE
虚拟语气的问题
SHOULD have...表示应该做却并没有做
COULD USE 指可以做
should have used是本该做却没做