“swear to sth.” 是一個(gè)固定的短語(yǔ),意思是“斷言,肯定,保證”
所以上句中having 是動(dòng)名詞,如果用have的話(huà)就錯(cuò)了,因?yàn)槎陶Z(yǔ)中to后不能加動(dòng)詞
要記住,to 是一個(gè)介詞,它可以接動(dòng)詞,也可以接名詞,雖然一般來(lái)說(shuō)都是動(dòng)詞,但涉及到某些固定搭配,或者表示朝、向某種趨勢(shì)等時(shí),后面會(huì)加名詞或動(dòng)名詞,例如：see to sth.辦理,照管,料理
the policeman could not swear to having seen the accused man at the scene of
the policeman could not swear to having seen the accused man at the scene of
為什么是swear to having 而不是to have
為什么是swear to having 而不是to have
英語(yǔ)人氣：796 ℃時(shí)間：2019-11-18 12:35:53
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