not be able to =be unable to? 这个词组的否定形式是什么

be___to cook=be not able to cook 填一词 Do not you be able to I will not be able to leave People from different countries may not be able to u( ) each other. not be able to =be unable to? 这个词组的否定形式是什么 be able to 用法 be able to中文 able to be assigned be able to be able to (送分拉) 请问：be able to be able to 意思 You want to not be able to breathe是什么意思? Do not install B you to be able to die Forever has is far I not to be able to Love does not want to be able to get kuai Not all kinds of viruses are able to be removed.“be able may not able to do sth 还是 may not be able to do sth?