when the rains begin to call?还有rains为什么有s?

we won't go to the mountains if it rains tomorrow为什么要用rains? The water will ____quickly when it rains. when it rains. She has to take a taxi when it rains.(划线部分提问,划when it rains) When it rains or winds,we will go to the g___ to take P.E.le i usually walk to the supermarket but ()when it rains ,Itake Daniel takes the bus to school when it rains .(对划线部分提问) When it rains, I usually go to school by bus. When it rains ,the English teacher will ask Don't stay ( )the tree when it rains.填介词. people,rains,it,when,is,bus,with,the,faiied. According to the weather report,it( rains)tomorrow.为什么不是will