could not have their meals at any time是部分否定还是完全否定?

怎么用not at all 来表达部分否定和完全否定? They both didn't do their best.是全部否定还是部分否定? i have time的否定句：i___ ____ any time All of us didn't go there yesterday.是部分否定还是完全否定? few、little用在句中,句子是完全否定句还是部分否定句? They have their meals in the dining--room(改否定句) 英语翻译既然all…not是部分否定,那么完全否定应该如何表示?比如说All answers are not corre We have some pens .（改为否定句） We have not any pens.还是 We do not All of us are not students这句话,是全部否定还是部分否定? every ……not,both……not是部分否定还是全部否定?练习上说是部分否定,但是我无法理解,求理解方法 Not at all是一个否定表达 have ever的否定形式是have not ever还是have never