表语从句(基础)

若从句为陈述句，直接加that;

若从句为特殊疑问句：直接保留特殊疑问词，后面的句子变成陈述句语序；

若从句为一般疑问句：先把一般疑问句变成陈述句语序，然后在其前加上weather或者If;

 

 

所谓表语 即在系动词之后的

Am, is,are, look, sound, taste, feel

 

China is no longer what she used to be.

The question is who is responsible for what has happened.