英语高手进We can't live without water, but now many rivers are po

来源：学生作业帮编辑：搜搜做题作业网作业帮分类：综合作业时间：2024/08/19 10:54:54

英语高手进
We can't live without water, but now many rivers are polluted.这里为什么要用are而不是用were,刚刚学习很不多不懂,貌似有ed的都用过去be动词

你好！国人研究的种种厉害语法规则不讲了。最简单的讲法: polluted在这里不是表示过去时，而是作为一个形容词，表示“受污染的”。有些河流是受污染的是表示现存的一个状态所以用are，如果用were则表示过去是受污染的，暗示现在状况已经不同了。

we can't live without water,but now water of man We can't live without water ( )air we can't live without water we can't live without water _air Fish can't live without water,but water can exist without fi 同义句:We can't live without water. People we can't live without but have to let We can't live without water.（同义句） ____ there is no water,we man can't live without ---water Fish can't live without water. i can't live without water翻译 we can't live without air or water,can we?应该答什么