it was not as clean as usual能不能解释一下语法结构

as ...as ...第一个as后面接形容词（red good pretty）第二个as后面接比较的对象
例如 as good as james 和james一样好 as pretty as Taylor Swift 和泰勒斯威夫特一样美丽
as usual 和平时一样 （固定用法）
as clean as usual
和平时一样干净 （这里比较的对象是：平时——as usual）
至于not 就是表示否定
not as clean as usual 不像平时那么干净
it was 简单了 直接字面理解就好~