---for their help ,we would not have overcome yhe diffculties.

\uff3ffor their help ,we would not have

\u5012\u88c5\u53e5\u91cc\u9762\u7684\u90e8\u5206\u5012\u88c5

\u9009B Had it not been for
1.\u7b49\u4e8e If it had not been for their help \u56e0\u4e3aIf \u7701\u7565\u4e86\uff0c\u4e60\u60ef\u4e0a\u53ea\u6709\u628a\u52a9\u52a8\u8bcdhad\u524d\u7f6e
2.\u8fd9\u662f\u4e2a\u56fa\u5b9a\u53e5\u578b\uff0c\u8868\u793a\u201c\u5982\u679c\u6ca1\u6709\u201d
3. \u4ece\u4e3b\u53e5\u5f62\u5f0f\u53ef\u89c1\uff0c\u8fd9\u662f\u8868\u793a\u4e0e\u8fc7\u53bb\u4e8b\u5b9e\u76f8\u53cd\u7684\u865a\u62df\u8bed\u6c14

\u5168\u53e5\u610f\u4e3a\uff1a \u5982\u679c\u6ca1\u6709\u4ed6\u4eec\u7684\u5e2e\u52a9\uff0c\u6211\u4eec\u4e0d\u4f1a\u6210\u529f\u7684\u3002


O(\u2229_\u2229)O \u8ba4\u540c\u8bf7\u91c7\u7eb3\uff0c\u4e0d\u61c2\u7ee7\u7eed\u95ee\u3002 \u795d\u5b66\u4e60\u8fdb\u6b65! \u8c22\u8c22\uff01

虚拟语气的用法。虚拟语气可以分为三种，分别是
1，对过去的事情相反的虚拟
If 主语 had done sth, 主语 should/would/might/could(not) have done sth.
2，对现在事情相反的虚拟
If 主语 did sth, 主语 should/would/might/could(not) do sth.
3，对将来事情相反的虚拟（此种用法前面一个分句的用法较多，就不一一写出来了。）
这道题是对小类1虚拟语气的考察，在对过去事情进行虚拟时，可以省略if，与此同时，要把had提前，但是记住，只能提前had，其余的成分都不能提前。而且此种用法只能在第一类虚拟中才能使用，第二第三种是不能省略if的。

因为had是助动词，而been是实意动词，英语在构成否定时是要否定助动词的，就是说not这个副词要紧跟在had的后面；而不像汉语那样直接用not去否定实意动词的。

此举考察的是虚拟语气的倒装，省略了if，还原应该是if it had been not for their help , we would not have overcome yhe diffculties.

b

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