表语从句在句中作表语.它位于主句的联系动词之后.that从句作表语.that不能省略.表语从句只用whether.不用if. ▲The problem is that smokers cannot go without smoking. 问题是抽烟的人不抽烟就会感到难受. ▲The question is whether it is worth doing. 问题是这是否值得做. ▲This is where he has worked for years. 这就是他多年工作的地方. 【查看更多】
