not how experiening rain rainbow,experiening为什么要加ing

not how experiening rain rainbow,experiening为什么要加ing How can wind and rain do not experience the rainbow How can you hear if you are not listening.为什么listening要加ing it's going to raining,为什么rain要加ING singing in the rain sing为什么要加ing? 为什么how are you feeling?要加ing dont leave her waiting outside in the rain这里wait为什么要加ing It has kept (raining) for two hours.为什么rain要加ing? 为什么要加ing rain后面可以加那些单词?像rainbow的、、、 为什么要加ing啊? 82为什么要加ing?