英语四大从句

主语从句:主要对主语起修饰作用e.g.Whether the plan is feasible remains to be proved. 宾语从句:主要是修饰宾语的e.g.Tell your mother whether you will come home on Friday. 同谓语从句:对句中名词做解释说明e.g.They are investigating the question whether the man is right. 表语从句：做表语的句子e.g.The point is whether we should go there.