为什么要用getting现在进行时

为什么要用getting现在进行时 we left there when it is getting dark .为什么用现在进行时? getting started.这里为什么getting是现在进行时而started又是过去时? get ready可以用现在进行时吗?比如 i am getting ready for school i have been getting scammed 是现在完成进行时 I'm getting dressed now.为什么又有ing又有ed?这句是现在进行时还是过去时啊? the weather is getting warm.为什么用进行时?为什么不用一般现在时呢? It 's getting bigger and busier.若此句不是现在进行时 为何get要加ing? He is getting old.请问这句话是现在进行时吗? 求解getting up early is good for your health中为何getting要用现在分词? 1.The food is getting cold.吃的东西已经变凉了.is getting 这里是现在进行时的意思? eec英语中I am getting dressed now.为什么同时加过去式与进行时