1)should無(wú)詞義,只是shall的過(guò)去形式,與動(dòng)詞原形構(gòu)成過(guò)去將來(lái)時(shí),只用于第一人稱,例如:
I telephoned him yesterday to ask what I should do next week.
我昨天給他打電話,問(wèn)他我下周干什么。
比較:
"What shall I do next week?" I asked.
"我下周干什么?"我問(wèn)道。(可以說(shuō),shall變成間接引語(yǔ)時(shí),變成了should。)
2) would也無(wú)詞義,是will的過(guò)去形式,與動(dòng)詞原形構(gòu)成過(guò)去將來(lái)時(shí),用于第二、第三人稱,例如:
He said he would come. 他說(shuō)他要來(lái)。
比較:
"I will go," he said. 他說(shuō):"我要去那兒。"
變成間接引語(yǔ),就成了:
He said he would come.
原來(lái)的will變成would,go變成了come.。