if和unless引导的条件状语从句 if和unless的用法!和区别!!在线等!!!!!!!!!!!!!!!!!! if和unless引导的条件状语从句

If\u6216Unless\u5f15\u5bfc\u7684\u6761\u4ef6\u72b6\u8bed\u4ece\u53e5\u540e\u63a5\u600e\u6837\u7684\u52a8\u8bcd\u65f6\u6001\uff1f

if \u4e0eunless \u5f15\u5bfc\u6761\u4ef6\u72b6\u8bed\u4ece\u53e5\u65f6\u90fd\u9075\u5faa\u201d\u4e3b\u5c06\u4ece\u73b0\u201c\u539f\u5219\uff0c\u4ece\u53e5\u7684\u4e00\u822c\u5c06\u6765\u65f6\u7528\u4e00\u822c\u73b0\u5728\u65f6\u4ee3\u66ff\uff0c\u5373\u4e3b\u53e5\u7528\u4e00\u822c\u5c06\u6765\u65f6/\u7948\u4f7f\u53e5\uff0c\u4ece\u53e5\u7528\u4e00\u822c\u73b0\u5728\u65f6\u3002\u6709\u65f6\u5b83\u4eec\u53ef\u4e92\u6362\u3002
\u5982\uff1a
1.If you work hard, you will get good results .
\u5982\u679c\u4f60\u52aa\u529b\u5b66\u4e60\uff0c\u4f60\u4f1a\u53d6\u5f97\u597d\u6210\u7ee9\u3002
=You won't get good results unless you work hard .
\u4f60\u4e0d\u4f1a\u53d6\u5f97\u597d\u6210\u7ee9\uff0c\u9664\u975e\u4f60\u52aa\u529b\u5b66\u4e60\u3002
2. You will miss the early bus if you don't get up early .
\u5982\u679c\u4f60\u4e0d\u65e9\u70b9\u8d77\u5e8a\u4f60\u4f1a\u9519\u8fc7\u65e9\u73ed\u8f66\u3002

if you buy me a good dinner, i'll give you her phone number
unless you buy me a good dinner, i won't give you her phone number.\u610f\u601d\u90fd\u662f\u5982\u679c\u4f60\u8bf7\u6211\u5403\u987f\u597d\u7684\uff0c\u6211\u5c31\u544a\u8bc9\u4f60\u5979\u7684\u7535\u8bdd\u53f7\u7801

IF是如果的意思,如果结果是肯定的那么IF后面引导的从句(从句在主句前面用逗号隔开)用一般现在时,而主句也用一般现在时。如果结果是可能的主句(从句用一般现在时)就用一般将来时。UNLESS相当于IF NOT就是如果不/除非的意思用法和刚才IF用的一样。总结:结果是肯定的就主现(在时)从现(在时)结果是可能的就是主将从现啦。无论结果是肯定的或可能的从句都是一般现在时而变化的是主句!!速记啊,望楼主采纳哈 求顶

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