卫生部的
幼苗
共回答了24个问题采纳率:100% 举报
表示肯定推测 must eg.A:I don't know which boy is Wangwei.
B:It must the one In blue
否定推测只能用can not eg.A:Who broke my window?
B:It can not be Lucy,because she has gone to Beijing.
must not 只能表示禁止,不能表示推测
You must not play fire in the forest.
1年前
6