they worked three days_____before ago long for哪一个?before和ago有什么区别,简洁些,

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/25 15:12:10
theyworkedthreedays_____beforeagolongfor哪一个?before和ago有什么区别,简洁些,theyworkedthreedays_____beforeagolon

they worked three days_____before ago long for哪一个?before和ago有什么区别,简洁些,
they worked three days_____
before ago long for哪一个?
before和ago有什么区别,简洁些,

they worked three days_____before ago long for哪一个?before和ago有什么区别,简洁些,
ago表示的时间以现在为基准,意思是“在现在以前”,因此要和动词的过去时连用,不和现在完成时连用.
before是指从过去某一时间算起的一段时间以前,意思是“在那时以前”、“更早的时候”,动词常用过去完成时,特别是在间接引语中用得多

例:I visited him three days ago,but his neighbour said he had gone to London two days before.
我3天前去拜访他,可是他的邻居说早在2天前他就到伦敦去了.