请解释：英语第三人称作主语时，谓动词什么时候要加‘s’。可举例！谢谢！ 英语第三人称单数举例
\u7b2c3\u4eba\u79f0\u82f1\u8bed\u7684\u95ee\u53e5\u8981\u4e0d\u8981\u52a0S\uff1f\u7b2c\u4e09\u4eba\u79f0\u7684\u95ee\u53e5\u4e2d\u5982\u679c\u6240\u6307\u4e8b\u7269\u662f\u5355\u6570\u5219\u8981\u52a0S
\u662f\u590d\u6570\u5219\u4e0d\u9700\u8981\u52a0\uff01
\u5927\u5bb6\u90fd\u77e5\u9053,\u5728\u4e00\u822c\u73b0\u5728\u65f6\u4e2d,\u5f53\u4e3b\u8bed\u662f\u7b2c\u4e09\u4eba\u79f0\u5355\u6570\u65f6,\u8c13\u8bed\u52a8\u8bcd\u8981\u7528\u7b2c\u4e09\u4eba\u79f0\u5355\u6570\u5f62\u5f0f,\u5373\u5e38\u5728\u52a8\u8bcd\u539f\u5f62\u540e\u52a0-s\u6216-es.\u4f46\u6709\u4e9b\u540c\u5b66\u4eec\u5bf9\u4e8e\u54ea\u4e9b\u4e3b\u8bed\u662f\u7b2c\u4e09\u4eba\u79f0\u5355\u6570\u8fd8\u4e0d\u5341\u5206\u6e05\u695a,\u73b0\u5f52\u7eb3\u603b\u7ed3\u5982\u4e0b\uff1a
\u4e00\u3001\u4eba\u79f0\u4ee3\u8bcdhe,she,it\u662f\u7b2c\u4e09\u4eba\u79f0\u5355\u6570.\u5982\uff1a
He likes watching TV.\u4ed6\u559c\u6b22\u770b\u7535\u89c6.
She has lunch at twelve.\u5979\u5341\u4e8c\u70b9\u5403\u5348\u9910.
It looks like a cat.\u5b83\u770b\u8d77\u6765\u50cf\u53ea\u732b.
\u4e8c\u3001\u5355\u4e2a\u4eba\u540d\u3001\u5730\u540d\u6216\u79f0\u547c\u4f5c\u4e3b\u8bed\uff1b\u662f\u7b2c\u4e09\u4eba\u79f0\u5355\u6570.\u5982\uff1a
\u2460Han Mei looks like her mother.\u97e9\u6885\u770b\u8d77\u6765\u50cf\u5979\u7684\u6bcd\u4eb2.
\u2461Beijing is in China.\u5317\u4eac\u5728\u4e2d\u56fd.
\u2462Uncle Wang often makes cakes.\u738b\u53d4\u53d4\u7ecf\u5e38\u505a\u86cb\u7cd5.
\u4e09\u3001\u5355\u6570\u53ef\u6570\u540d\u8bcd\u6216"this / that / the+\u5355\u6570\u53ef\u6570\u540d\u8bcd"\u4f5c\u4e3b\u8bed\u65f6,\u662f\u7b2c\u4e09\u4eba\u79f0\u5355\u6570.\u5982\uff1a
\u2460A horse is a useful animal.\u9a6c\u662f\u6709\u7528\u7684\u52a8\u7269.
\u2461This book is yours.\u8fd9\u672c\u4e66\u662f\u4f60\u7684.
\u2462That car is red.\u90a3\u8f86\u5c0f\u6c7d\u8f66\u662f\u7ea2\u8272\u7684.
\u2463The cat is Lucy's.\u8fd9\u53ea\u732b\u662f\u9732\u831c\u7684.
\u56db\u3001\u4e0d\u5b9a\u4ee3\u8bcdsomeone,somebody,nobody,everything,something\u7b49\u53ca\u6307\u793a\u4ee3\u8bcdthis,that\u4f5c\u4e3b\u8bed\u65f6,\u662f\u7b2c\u4e09\u4eba\u79f0\u5355\u6570.\u5982\uff1a
\u2460Everyone is here.\u5927\u5bb6\u5230\u9f50\u4e86.
\u2461There is something wrong with the watch.\u8fd9\u5757\u624b\u8868\u6709\u6bdb\u75c5.
\u2462This is a pen.\u8fd9\u662f\u4e00\u652f\u94a2\u7b14.
\u2463That is an eraser.\u90a3\u662f\u4e00\u5757\u6a61\u76ae\u64e6.
\u4e94\u3001\u4e0d\u53ef\u6570\u540d\u8bcd\u4f5c\u4e3b\u8bed\u65f6\u4e3a\u7b2c\u4e09\u4eba\u79f0\u5355\u6570.\u5982\uff1a
\u2460The milk is in the glass.\u725b\u5976\u5728\u73bb\u7483\u676f\u91cc.
\u2461The bread is very small.\u90a3\u9762\u5305\u5f88\u5c0f.
\u516d\u3001\u5f53\u6570\u5b57\u6216\u5b57\u6bcd\u4f5c\u4e3b\u8bed\u65f6,\u770b\u4f5c\u7b2c\u4e09\u4eba\u79f0\u5355\u6570.\u5982\uff1a
\u2460"6" is a lucky number."6"\u662f\u4e2a\u5409\u5229\u6570\u5b57.
\u2461"I" is a letter."I"\u662f\u4e2a\u5b57\u6bcd.
首先，时态是一般现在时，也就是经常地或习惯的动作或状态
其次，谓语动词是实意动
第三人称单数作主语
分析所给例句
He works hard.一般现在时，单数第三人称作主语，谓语动词加s.
He can handle defeat.谓语动词有情态动词
Did he work here long ?时态是过去时
Can he make me happy?谓语动词有情态动词
Has he drank the milk?现在完成时
主要是主语是单数 第一句是一般现在时
第二句是也是一般现在时 不过它有情态动词can 情态动词后面用动词原形 所以没加s
第三句是一般过去式 而且是问句 助动词提前 动词work用动词原形 如果是陈诉句 He was very happy yesterday.
第四句是情态动词的问句
第五句是现在完成式 在第三人称中 have 变has
第三人称 “单数” 作主语（he,she.it或可以用这几个词指代的名词），时态是“一般现在时”的时候，才在 “行为动词” 后加s
正如你的第一个例子
亲：只要是一个实义动词的时候，没有can,may,must,will等助动词或者情态动词。
例如：He studies carefully.
Tom works hard.
My mother likes cooking.
Does he work hard?
一般现在时，主语是单数的时候。
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