牛津6A语法专项练习(3)一.根据要求写单词1.know(同音词)????????????????2.shouldnt(完整形式)????????????3.quiet(副词)???4.littering(原形)????????????5.smoke(现在分词)?????????????????6.touch(三单式)??7.do not (缩略式)????8.drink ((现在分词)??