could you come over to my house .sorry ,i ---.i have to do my homework first括号里是填could还是 couln't还是 can还是 can't
问题描述：
could you come over to my house .sorry ,i ---.i have to do my homework first
括号里是填could还是 couln't还是 can还是 can't
答
用can't,
因为首先要做作业,所以是否定
问句中的could表示委婉
答
can't
1 can/could的否定式都是can't
2 他说他要先做作业 说明不能去
答
can't
答
can’t