通常加个 be 动词和 对动词原型加 ing ,（注意：有些动词改成 ing 形式前要除掉一些结尾字母或加个字母)例：I go => I am goingHe goes => he is goingWe bake => we are bakingShe runs => she is running等等.希望...如果有两个动词，而且句子是过去时态，我的意思是这个：I （do）something and (do) something.两个do都加ing还是只加一个？两个都要加 ing ，但前面要有 be动词，比如I am doing this and doing that....They were doing this but I was doing that ...等等。