when vs if,咋选? 🤷♀️ 在状语从句中,when 和 if 都可以用来引导条件状语从句,但它们之间有着微妙的差别。 🌈 当谈论可预见或重复的情况时,两者的区别在于确定性。例如,句子 "I will be happy when my friend gives me a present" 表达的是一种确定的情况,而 "I will be happy if my frien...
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"When" refers to the timing of events and is used for scenarios that are expected to occur, while "if" is used to introduce conditional situations that may or may not happen. Difference Between When and If Table of Contents ADVERTISEMENTKey...
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When should you use if vs. when? Examine their meanings and learn when to use if or when in a sentence.
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Conditionals: Zero and First (If vs When)If I see her, I tell her what you said.doi:10.1007/978-3-319-70984-0_17Adrian Wallwork
If I were you,I would have taken his advice. If I were you 如果我是你——此处是指泛指(常态) If I had been you, I would have taken his advice. If I had been you 如果我(那时)是你——此处是指特指(非常态) 转述一个老外的观点: If I had been/done is used when it's irreversible...
所以when引导定语从句是关系副词,作从句的状语,然后整个从句修饰的是先行词。而when引导状语从句,when不充当任何句子成分,仅起连接从句和主句的作用,状语从句修饰的是主句的谓语动词。 I have a book that was bought yesterday,我有一本昨天买的书。(that是关系代词作定语从句主语) I still remember the day when...
#if、#elif、#else 和 #endif 指令可以嵌套在其他 #if 指令的 text 部分中。 每个嵌套的 #else、#elif 或 #endif 指令属于最靠近的前面的 #if 指令。 如果没有条件的计算结果为非零值,则预处理器在 #else 指令之后选择文本块。 如果省略 #else 子句,并且没有条件的计算结果为非零值,则不会选择文本块。