if、in case、in the event、on condition that、on the understanding that辨析

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(1)if
(2)in case
(3)in the event
(4)on condition that
(5)on the understanding that

在英语中有些情况下都包含或表示“如果”的意思。以下是部分词语的详细解释和区别:

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ifif[If; if]连接词A1 如果…,假使…a. [就现在、过去、未来可能实现之事加以推测时]If you are tired, we will go straight home.如果你疲倦了,我们就直接回家If you have finished reading this book, please return it to me.如果你念完这本书,请 ...

in caseif 如果；若*In case he arrives be fore I get back，please ask him to wait．如果 我回来前他就到了，请叫他等我。*In case it rains，do not expect me． 如果天下雨，就不要指望我来了。*in case of in the event of； as for要是；在… 时（候）In case of fire，the ...

on condition thatif；provided that假如；在…条件下*I will lend you the money on condition that you pay it back in one month．假如你在一个月内能还我钱，我就借给你。*You can go there on condition that you don't come back late for dinner．你可以去那儿，条件是回 ...