用所给单词的适当形式填空。 按要求改写句子。答:means,taking;things;are;was,am;stand,third;pictures,fifth;Don't eat;have been,were;was, was not;is coming, to come;balloon,to buy;be drawing;blow, can;to go, swiming;was.1.否定句:It doesn't mean you shouldn't walk on the grass.一般疑问句:Does it mean you shouldn't ...