情態(tài)動(dòng)詞+have+done有兩種用法：一是表示對(duì)過去的一種推測(cè),另一種表示對(duì)過去的虛擬.
在這個(gè)句子中,表示一種虛擬,是對(duì)過去的虛擬,意思是“本來沒有必要,而實(shí)際上已經(jīng)做了”.
這句話的意思是：我們本來沒有必要著急,火車還沒走嗎!
we neednot have worried because the train doesn't leave
we neednot have worried because the train doesn't leave
worried 前要加個(gè)have 為何?
doesn't leave
是一般現(xiàn)在時(shí)啊，怎么是對(duì)過去的虛擬呢？
worried 前要加個(gè)have 為何?
doesn't leave
是一般現(xiàn)在時(shí)啊，怎么是對(duì)過去的虛擬呢？
英語(yǔ)人氣：523 ℃時(shí)間：2020-02-03 08:14:27
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