以下单词的复数形式和过去式.actually,attack,attitude,a great number of,add up,as a matter of fact,as if,as usual,at an end,at present,at dusk.
问题描述：
以下单词的复数形式和过去式.
actually,attack,attitude,a great number of,add up,as a matter of fact,as if,as usual,
at an end,at present,at dusk.
答
actually 是副词,没有复数形式及过去式 attacks attacked attitude应该没有复数形式 added up 其他大部分是介词短语不存在你说的形式吧~