to be 与being 的区别His mum got lost in the big store,never (to be heard of\being heard of) again.为什么选前一个?

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to be 与being 的区别His mum got lost in the big store,never (to be heard of\being heard of) again.为什么选前一个?
to be 与being 的区别
His mum got lost in the big store,never (to be heard of\being heard of) again.
为什么选前一个?

to be 与being 的区别His mum got lost in the big store,never (to be heard of\being heard of) again.为什么选前一个?
此处非谓语动词作状语,二者皆可作状语但不定式一般作目的或结果状语[to do 前一般有only,表意想不到结果eg.I arrived at the station only to find the train gone]或在be +情感形容词后作原因状语eg.I am sorry to hear that.不定式与谓语动词有先后关系; -ing分词在句首一般作时间,原因或条件状语,在句末一般作方式,伴随或结果状语但时间上与谓语动词同时,若强调先后用having done.[eg.Being ill,I can not work./Hearing the news,she cried./His parents both died ,leaving him alone./Having finished his work,he went home.