if 后边的be动词要用were吗 If I were a boy与If I am a boy。...

as if she \u540e\u9762\u7684be\u52a8\u8bcd\u662f\u7528was\u8fd8\u662fwere

as if \u5f15\u5bfc\u7684\u65b9\u5f0f\u72b6\u8bed\u4ece\u53e5\u6240\u8868\u7684\u7684\u5185\u5bb9\u5982\u679c\u4e0e\u5b9e\u9645\u60c5\u51b5\u76f8\u53cd,\u6216\u8005\u53d1\u751f\u7684\u53ef\u80fd\u6027\u4e0d\u5927,\u5219\u9700\u8981\u4f7f\u7528\u865a\u62df\u8bed\u6c14,\u4e5f\u5c31\u662f\u4f60\u8bf4\u7684\u7cfb\u52a8\u8bcdbe\u7528were,\u4e0d\u8bba\u4e3b\u8bed\u4e3a\u7b2c\u51e0\u4eba\u79f0..
\u5982\uff1aIt seemed as if the meeting would never end.\u770b\u8d77\u6765\u4f1a\u5f00\u8d77\u6765\u6ca1\u5b8c\u6ca1\u4e86\u7684.\uff08\u4f1a\u8bae\u7ec8\u7a76\u4f1a\u7ed3\u675f\uff09
\u4f46\u662f,\u5982\u679c\u4ece\u53e5\u4e2d\u662f\u53ef\u80fd\u6027\u8f83\u5927\u7684\u4e8b\u5b9e\u7684\u8bdd,be\u52a8\u8bcd\u4e0d\u9700\u53d8\u4e3awere.
\u5982\uff1aIt seemed as if is was going to rain.\u4eff\u4f5b\u5929\u8981\u4e0b\u96e8.\uff08\u4e0b\u96e8\u7684\u53ef\u80fd\u6027\u8f83\u5927\uff09.

\u4e24\u4e2a\u53e5\u5b50\u7684\u8bed\u53e5\u72b6\u6001\u4e0d\u540c\uff0c\u524d\u8005\u662f\u865a\u62df\u8bed\u6c14\u540e\u8005\u662f\u4e00\u822c\u6761\u4ef6\u72b6\u8bed\u4ece\u53e5\uff0c\u56e0\u6b64\u9700\u8981\u7528\u8c13\u8bed\u7684\u7279\u6b8a\u5f62\u6001\uff0c\u5373\u7528were\u66ff\u4ee3am\u3002
1\u3001\u865a\u62df\u8bed\u6c14\u8868\u793a\u8bf4\u8bdd\u4eba\u7684\u4e3b\u89c2\u613f\u671b\u3001\u731c\u7591\u3001\u5efa\u8bae\u6216\u4e0e\u4e8b\u5b9e\u4e0d\u7b26\u7684\u5047\u8bbe\u7b49\uff0c\u800c\u4e0d\u8868\u793a\u5ba2\u89c2\u5b58\u5728\u7684\u4e8b\u5b9e\u3002\u865a\u62df\u8bed\u6c14\u662f\u7531\u53e5\u4e2d\u7684\u8c13\u8bed\u52a8\u8bcd\u7684\u7279\u6b8a\u5f62\u5f0f\u8868\u793a\u51fa\u6765\u7684\u3002
If I were a boy.\u7684\u8bed\u5883\u8868\u793a\u8bf4\u8bdd\u7684\u4eba\u662f\u4e2a\u5973\u5b69\uff0c\u800c\u5979\u5047\u8bbe\u81ea\u5df1\u662f\u4e2a\u7537\u5b69\uff0c\u4e0e\u4e8b\u5b9e\u4e0d\u7b26\uff0c\u56e0\u6b64\u7528\u865a\u62df\u8bed\u6c14\u3002
\u7c7b\u4f3c\u7684\u53e5\u5b50\u8fd8\u6709\uff1a
If I were a bird\uff0cI would be able to fly in the air.
2\u3001\u4e00\u822c\u6761\u4ef6\u72b6\u8bed\u4ece\u53e5\u662f\u7531\u5f15\u5bfc\u8bcdif\u6216unless\u5f15\u5bfc\u7684\u72b6\u8bed\u4ece\u53e5\u53eb\u505a\u6761\u4ef6\u72b6\u8bed\u4ece\u53e5\u3002\u5728\u82f1\u6587\u4e2d\uff0c\u6761\u4ef6\u662f\u6307\u67d0\u4e00\u4ef6\u4e8b\u60c5\u5b9e\u73b0\u4e4b\u540e\uff08\u72b6\u8bed\u4ece\u53e5\u4e2d\u7684\u52a8\u4f5c\uff09\uff0c\u5176\u5b83\u4e8b\u60c5\uff08\u4e3b\u53e5\u4e2d\u7684\u52a8\u4f5c\uff09\u624d\u80fd\u53d1\u751f\uff0c\u901a\u5e38\u8bd1\u4f5c\u201c\u5047\u5982\u201d\u3002
If I was a boy.\u7684\u8bed\u5883\u5219\u8868\u660e\u8bf4\u8bdd\u7684\u4eba\u53ef\u80fd\u5c31\u662f\u4e2a\u7537\u5b69\uff0c\u8868\u793a\u4e00\u79cd\u4e0e\u4e8b\u5b9e\u76f8\u7b26\u7684\u60c5\u51b5\uff0c\u56e0\u6b64\u7528was\u3002

\u6269\u5c55\u8d44\u6599\uff1a
\u865a\u62df\u8bed\u6c14\u5728\u6761\u4ef6\u72b6\u8bed\u4e2d\u7684\u5e94\u7528\uff1a
\u4ece\u53e5\uff1aIf+\u4e3b\u8bed+\u52a8\u8bcd\u4e00\u822c\u8fc7\u53bb\u65f6(Be\u52a8\u8bcd\u7528were)
\u4e3b\u53e5\uff1a\u4e3b\u8bed+ should/would/might/could+do\uff1a
1\u3001If I were you\uff0cI would take an umbrella.\u5982\u679c\u6211\u662f\u4f60\uff0c\u6211\u4f1a\u5e26\u628a\u4f1e\u3002\uff08\u4e8b\u5b9e\uff1a\u6211\u4e0d\u53ef\u80fd\u662f\u4f60\uff09
2\u3001If I knew his telephone number\uff0cI would tell you.\u5982\u679c\u6211\u77e5\u9053\u4ed6\u7684\u7535\u8bdd\u53f7\u7801\uff0c\u6211\u5c31\u4f1a\u544a\u8bc9\u4f60\u3002\uff08\u4e8b\u5b9e\uff1a\u4e0d\u77e5\u9053\uff09
3\u3001If there were no air or water\uff0cthere would be no living things on the earth.\u5982\u679c\u6ca1\u6709\u6c34\u548c\u7a7a\u6c14\uff0c\u5730\u7403\u4e0a\u5c31\u4e0d\u4f1a\u6709\u751f\u7269\u3002(\u4e8b\u5b9e\uff1a\u5730\u7403\u4e0a\u65e2\u6709\u7a7a\u6c14\u4e5f\u6709\u6c34)
4\u3001If I had any money with me\uff0cI could lend you some.\u5982\u679c\u6211\u5e26\u94b1\u4e86\uff0c\u6211\u5c31\u4f1a\u501f\u7ed9\u4f60\u4e9b\u3002\uff08\u4e8b\u5b9e\uff1a\u6ca1\u6709\u5e26\u94b1\uff09
5\u3001If he studied harder\uff0che might pass the exam.\u5982\u679c\u4ed6\u518d\u52aa\u529b\u4e9b\uff0c\u5c31\u80fd\u901a\u8fc7\u8003\u8bd5\u4e86\u3002\uff08\u4e8b\u5b9e\uff1a\u6ca1\u6709\u52aa\u529b\uff09
6\u3001If I were you\uff0c I'd wear a shirt and tie.\u5982\u679c\u6211\u662f\u4f60\uff0c\u6211\u5c31\u4f1a\u7a7f\u886c\u886b\u548c\u9886\u5e26\u3002(\u4e8b\u5b9e\uff1a\u6211\u5e76\u4e0d\u662f\u4f60\uff09
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-\u865a\u62df\u8bed\u6c14
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-\u6761\u4ef6\u72b6\u8bed\u4ece\u53e5

虚拟语气中就会用were，即表示与现实相反。
E.g. 假如我是你，我就去加州度假了。
If I were you, I would spend the vocation in California.

虚拟语气要加 其他的一般不加

虚拟语气才要用were，其他情况该用啥就用啥。

虚拟条件状语从句\r\n因为从句用了过去式，且be动词用的were\r\n主句用了would加动词原形\r\n表示的是对现在的虚拟

对 虚拟语气 if用过去式

扩展阅读：什么时候用would be ... she的be动词是什么 ... it的be动词是什么 ... 什么情况下用would be ... we are be ... we后面加什么be动词 ... 小学be动词口诀 ... we做主语be动词用哪个 ... you的be动词是什么 ...