if it rains tomorrow,i will stay at home和if it rained,i would stay at home意思和用法有什么不同

题目

if it rains tomorrow,i will stay at home和if it rained,i would stay at home意思和用法有什么不同
if it rains tomorrow,i will stay at home和
if it rained tomorrow,i would stay at home强调的意思和用法有什么不同,请再对比举例

答案

if it rains tomorrow,i will stay at home
这句表达将来的假设,是If引导的条件状语从句（主句将来时,从句用现在时）,如果明天下雨,我会代呆在家里
if it rained tomorrow,i would stay at home
算是一种虚拟语气,如果明天下雨,我会呆在家里（实际上从各方面的消息可确定,比如从天气预报上得知,明天根本不会下雨）表达明天会去!