tom's mother needed__at once___made him worried.a.operating on ,that.b.operating on,which.c.operating,that.d.being opreating,which.为什么不能用being operated ON呢?
问题描述：
tom's mother needed__at once
___made him worried.
a.operating on ,that.
b.operating on,which.
c.operating,that.
d.being opreating,which.
为什么不能用being operated ON呢?
答
need+v-ing 意思上相当于被动
答
need 做动词时为及物动词，后加名词n或动名词v-ing.
答
need want require 等表示“要求 需要”之意的动词,如果表达的是“某是需要被做”时,后面加doing 或to be done