有if的句子怎么读,急!在线等,像If I have no food,I will die.升降音怎么读句子的升和降音一直没搞懂,那位大仙帮忙告诉我,急!在线等待!从句在后怎么读?像what will tigers do if they have babies?if前的是升是降?if后的呢?帮忙说清楚点,追分追分!!!!!!急!!!!!!

问题描述:

有if的句子怎么读,急!在线等,像If I have no food,I will die.升降音怎么读
句子的升和降音一直没搞懂,那位大仙帮忙告诉我,急!在线等待!
从句在后怎么读?像what will tigers do if they have babies?
if前的是升是降?if后的呢?
帮忙说清楚点,追分追分!!!!!!急!!!!!!

if 从句升调,主句降调