语法02－10－28!!!

susan919

33. Machines need energy to function, whether it is animal or human muscle, wind or waters currents, or heat-generated energy, such as steam。

答案是C，但是A为什么对？need sb to be done 和 need doing 啊～

没有need to do！

juningw

need to do绝对正确，这样的例子比比皆是。查查字典，google一下。

sunaoneverchang

同意楼上

改为water

酷小牛

water在这里修饰currents

酷小牛

function可作为动词，意思是work,operate

dengfu

33. Machines need energy to function, whether it is animal or human muscle, wind or waters currents, or heat-generated energy, such as steam。

答案应该是C，首先water是不可数名词，除了指水域；其次，名词做定语，只能用单数形式；

关于A，正如楼上mm所讲，function可以做动词用；need及物动词，可以接不定式（to do），动名词（doing），名词做宾语，也可以接爽宾语 sb to do sth；

need doing 的意思是 “需要被做。。”和want 是一样的: This radio needs fixing.