2、什么是名词性从句
（1）主语从句：从句充当主语，What i read looks terrific.
（2）宾语从句：从句充当宾语，I appreciate what he did.
（3）表语从句：从句充当表语，He becomes who we should learning.
（4）同位语从句：从句做同位语,I enjoy the part that they stay together.
什么是名词性从句？名词在句子中能够充当的成分，从句都可以充当，这就是名词性从句。名词性从句一共包含四类，分别是主语从句、宾语从句、表语从句和同位语从句。
