This kind of machine_cutting paper.A uses for B is using for C is used for D is used to
问题描述:
This kind of machine_cutting paper.A uses for B is using for C is used for D is used to
请给出答案后说明理由,并请特意说一下B ,C,D的区别!
答
B是现在进行时,而根据句意应理解为一般现在时较妥当.
is used for被用作后加动词的ing形式
is used to被用作 后加动词原形
be动词后加动词的过去分词 ,是被动语态的基本结构
(use的过去分词是used)