什么时候第三人称单数后不加S? 英语第三人称单数动词何时不加“S”
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1.\u5f53\u4e3b\u8bed\u4e3a\u7b2c\u4e09\u4eba\u79f0\u5355\u6570\uff0c\u65f6\u6001\u4e3a\u4e00\u822c\u73b0\u5728\u65f6\u65f6\uff0c\u52a8\u8bcd\u5f62\u5f0f\u4e3a\u7b2c\u4e09\u4eba\u79f0\u5355\u6570\u73b0\u5728\u65f6\u3002
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\u4f8b\u5982\uff1aworks \u5de5\u4f5c runs \u8fd0\u884c
2.\u5f53\u52a8\u8bcd\u539f\u5f62\u4ee5\u53d1\u549d\u64e6\u97f3\u7684-s\u3001-z\u3001-ch\u3001-sh\u3001-x\u3001\u8f85\u97f3\u52a0o\u7ed3\u5c3e\u65f6\uff0c\u540e\u9762\u52a0-es\uff0c
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3.\u5f53\u52a8\u8bcd\u539f\u5f62\u4e3a\u8f85\u97f3\u52a0y\u7ed3\u5c3e\u65f6\uff0c\u53d8y\u4e3ai\uff0c\u518d\u52a0-es\uff0c
\u5982\uff1acarries \u643a\u5e26 studies \u5b66\u4e60 cries \u54ed
4.\u52a8\u8bcdbe\u7684\u7b2c\u4e00\u4eba\u79f0\u5355\u6570\u73b0\u5728\u65f6\u4e3aam\uff0c\u7b2c\u4e8c\u4eba\u79f0\u5355\u590d\u6570\u548c\u7b2c\u4e00\u3001\u4e09\u4eba\u79f0\u590d\u6570\u73b0\u5728\u65f6\u4e3aare\uff0c\u7b2c\u4e09\u4eba\u79f0\u5355\u6570\u73b0\u5728\u65f6\u4e3ais\u3002\u52a8\u8bcdhave\u7684\u7b2c\u4e09\u4eba\u79f0\u5355\u6570\u73b0\u5728\u65f6\u4e3ahas\u3002
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\u5982\u679c\u52a8\u4f5c\u662f\u53d1\u751f\u5728\u8fc7\u53bb\uff0c\u8c13\u8bed\u52a8\u8bcd\u53d8\u6210\u8fc7\u53bb\u5f0f\uff0c\u56e0\u4e3a\u8fc7\u53bb\u5f0f\u6ca1\u6709\u7b2c\u4e09\u4eba\u79f0\u5355\u6570\uff08was/were\u52a8\u8bcd\u9664\u5916\uff09.
\u4f8b\u5982\uff1aShe finished her homework yesterday.
\u5982\u679c\u53e5\u5b50\u662f\u7701\u7565\u4e86should\u7684\u865a\u62df\u8bed\u6c14\uff0c\u90a3\u4e48\u8c13\u8bed\u52a8\u8bcd\u4e5f\u662f\u4e0d\u9700\u8981\u53d8\u578b\u3002
\u4f8b\u5982\uff1a
The teacher suggested that Mary go home immediately.
read的原型，过去式，过去分词都是read！此句是过去的事情，其中的read是其过去式形式，不用加s
因为这里的read是过去式，过去式（过去时和过去完成时）没有人称或数词的变化,也就是没有单3
这里的read是read的过去分词，“he read the phrase slowly”过去分词不受三单的影响。
这是动词的过去式吧应该不用加的。。read过去式和它本身是一样的。。
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